Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Estimated effect of ipilimumab on paclitaxel AUC(INF). Point estimates and 90% confidence intervals (CIs) for means and differences between means on the log scale were exponentiated to obtain estimates for geometric means and ratio of geometric means on the original scale for the paclitaxel/carboplatin/ipilimumab combination (Day 43) relative to paclitaxel/carboplatin alone (Day 1).

A general linear mixed model was applied to paclitaxel log[AUC(INF)] using study day as a fixed effect.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

null hypothesis of no mean ALC changes over time in any treatment group. Conditional F-tests were used to test for mean ALC changes over time in each treatment arm and the difference between treatment arms in the pattern of change in ALC over time.

15 degrees freedom (DF) in numerator and 335 DF in denominator.

p-value was not corrected for multiple testing. F-statistic = 1.86.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received paclitaxel 175 mg/m^2 intravenously (IV) by a 3-hour infusion and carboplatin IV by a 30-minute infusion) on Day 1 (Week 1, Day 1) and ipilimumab 10 mg/kg IV administered on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10, and paclitaxel/carboplatin were administered every 3 weeks (Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the paclitaxel and then carboplatin infusions. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received dacarbazine 850 mg/m^2 IV by a 1-hour infusion on Day 1 (Week 1, Day 1) and ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes on Day 3 (Week 1, Day 3). Ipilimumab was administered at Weeks 4, 7, and 10 and dacarbazine at Weeks 4, 7, 10, 13, 16, 19, and 22), with participants receiving the ipilimumab infusion first, followed by the dacarbazine infusion. A maximum of 8 doses of chemotherapy was permitted. Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.

Induction Phase: Participant received ipilimumab at a dose of 10 mg/kg IV administered over 90 minutes every 3 weeks for up to 4 doses (Week 1 Day 1, and Weeks 4, 7, and 10). Maintenance Phase: Ipilimumab was administered at a dose of 10 mg/kg every 12 Weeks, beginning at Week 24, until disease progression, study drug-associated toxicity, withdrawal of consent or study closure.