PFS was the time from randomization to the first objective progression as defined by Response Evaluation Criteria in Solid Tumors, Version 1.1 (RECIST v 1.1) or death from any cause, whichever occurred first. Progressive disease (PD) was defined as ≥20% increase in sum of diameter (SOD) of target lesions and short axes of target lymph nodes, taking as reference the smallest sum of the longest diameters recorded since treatment started and an absolute increase in sum diameter of ≥5 millimeters (mm); appearance of ≥1 new lesions and/or unequivocal progression of existing non-target lesions. Participants alive and without disease progression were censored at the time of the last objective tumor assessment. Participants who did not progress and were lost to follow-up were censored at their last radiographic assessment. If no baseline or post baseline radiologic assessments were available, participants were censored at date of randomization.

Intent-to-Treat (ITT) Population: All randomized participants. Participants censored: Pem+Carb/Cis=14, Ram+Pem+Carb/Cis=13, Gem+Carb/Cis=14, Ram+Gem+Carb/Cis=18.

Best overall response of CR or PR was defined using RECIST v 1.1 criteria. CR was defined as the disappearance of all lesions, pathological lymph node reduction in short axis to <10 mm, and normalization of tumor marker levels of non-target lesions. PR was defined as ≥30% decrease in SOD of target lesions taking as reference the baseline sum diameter. PD was defined as ≥20% increase in SOD of target lesions and short axes of target lymph nodes, taking as reference the smallest sum of the longest diameters recorded since treatment started and an absolute increase in sum diameter of ≥5 mm; appearance of ≥1 new lesions and/or unequivocal progression of existing non-target lesions. Participants who had no post baseline tumor assessments were considered non-responders and included in the denominator when calculating response rate. Percentage of participants=(number of participants with CR+PR/total number of participants)*100.

ITT Population: All randomized participants.

OS was defined as the time from the date of randomization to the date of death from any cause. If the participant was alive at the end of the follow-up period or was lost to follow-up, OS was censored on the last date the participant was known to be alive.

ITT Population: All randomized participants. Participants censored: Pem+Carb/Cis=22, Ram+Pem+Carb/Cis=16, Gem+Carb/Cis=32, Ram+Gem+Carb/Cis=32. Censored participants were included in the analysis.

DOR was measured from the time criteria were met for the first objectively recorded CR or PR until the first date criteria for PD were met or death. Response was defined using RECIST v 1.1 criteria. CR was defined as the disappearance of all lesions, pathological lymph node reduction in short axis to <10 mm, and normalization of tumor marker level of non-target lesions. PR was defined as ≥30% decrease SOD of target lesions taking as reference the baseline sum diameter. PD was defined as ≥20% increase in SOD of target lesions and short axes of target lymph nodes, taking as reference the smallest sum of the longest diameters recorded since treatment started and an absolute increase in sum diameter of ≥5 mm; appearance of ≥1 new lesions and/or unequivocal progression of existing non-target lesions. Participants who did not relapse were censored at the day of their last objective tumor assessment.

All randomized participants with a best overall response of CR or PR. Participants censored: Pem+Carb/Cis=44, Ram+Pem+Carb/Cis=35, Gem+Carb/Cis=50, Ram+Gem+Carb/Cis=37.

Data presented are the number of participants with at least 1 treatment-emergent adverse event (TEAE) and treatment-emergent serious adverse event (SAE), as well as, the number of participants who died during the study. TEAEs were defined as serious and other non-serious AEs that occurred or worsened after study treatment (regardless of causality). A summary of SAEs and other non-serious adverse events, regardless of causality, is located in the Reported Adverse Events module.

All randomized participants who received at least 1 dose of study drug.

DCR: percentage of participants with CR, PR, or SD using RECIST v 1.1 criteria. CR: disappearance of all lesions, pathological lymph node reduction in short axis to <10 mm, and normalization of tumor marker levels of non-target lesions. PR: ≥30% decrease in SOD of target lesions taking as reference baseline sum diameter. PD: ≥20% increase in SOD of target lesions and short axes of target lymph nodes, taking as reference smallest sum of longest diameters recorded since treatment started and an absolute increase in sum diameter ≥5 mm; appearance of ≥1 new lesions and/or unequivocal progression of existing non-target lesions. SD: neither sufficient shrinkage to qualify for PR nor increase to qualify for PD. Participants who had no post baseline tumor assessments were considered non-responders and included in the denominator when calculating response rate. Percentage of participants=(number of participants with CR+PR+SD/total number of participants)*100.

ITT Population: All randomized participants.

CTS was defined as the log ratio of tumor size at 6 weeks to tumor size at baseline. CTS at 6 weeks=Log (Sum of Target Lesion Measurements at 6 Weeks)-Log (Sum of Target Lesion Measurements at Baseline).

All randomized participants with results at baseline and 6 weeks.