Participants may receive 'nab-paclitaxel' taxane chemotherapy as per investigator's choice, administered in line with the respective product information and/or recognized clinical practice guidelines.

Participants may receive 'paclitaxel' taxane chemotherapy as per investigator's choice, administered in line with the respective product information and/or recognized clinical practice guidelines.

Participants will receive pertuzumab 840 milligrams (mg) IV on Day 1 or Day 2 of Cycle 1, followed by 420 mg IV on Day 1 or Day 2 of each subsequent 3-week cycle.

Participants will receive trastuzumab (Herceptin) 8 milligrams per kilogram (mg/kg) IV on Day 1 or Day 2 of Cycle 1, followed by 6 mg/kg IV on Day 1 or Day 2 of each subsequent 3-week cycle, administered in line with the respective product Information and/or recognized clinical practice guidelines.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE. MedDRA version 22.1 was used to code AEs by system organ class (SOC) and preferred term (PT); PTs that are part of a given SOC are listed in the rows directly below each SOC within the results table. If a participant experienced the same AE at more than one severity grade, only the most severe grade was presented.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE. MedDRA version 22.1 was used to code AEs and the system organ classes are presented in descending order according to the total frequency of occurrence. If a participant experienced more than one event in a category, they were counted only once in that category.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE. MedDRA version 22.1 was used to code AEs and the preferred terms are presented in descending order according to the total frequency of occurrence. If a participant experienced more than one event in a category, they were counted only once in that category.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE. MedDRA version 22.1 was used to code AEs and the preferred terms are presented in descending order according to the total frequency of occurrence. If a participant experienced more than one event in a category, they were counted only once in that category. Discont. = discontinuation; Ptz = pertuzumab; Tax = taxane; Trz = trastuzumab

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE. MedDRA version 22.1 was used to code AEs and the preferred terms are presented in descending order according to the total frequency of occurrence. If a participant experienced more than one event in a category, they were counted only once in that category. Interrupt. = interruption; Ptz = pertuzumab; Tax = taxane; Trz = trastuzumab

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first dose of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, it was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. If a participant had more than one event in a category, they were counted only once in that category. TEAEs to monitor included anaphylaxis and hypersensitivity, cardiac dysfunction, diarrhoea Grade ≥3, pregnancy-related AEs, interstitial lung disease, infusion-/administration-related reactions, mucositis, (febrile) neutropenia, rash/skin reactions, and suspected transmission of infectious agent. MedDRA version 22.1 was used to code AEs; AEs may fall within multiple categories.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first dose of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, it was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. If a participant had more than one event in a category, they were counted only once in that category. TEAEs to monitor included anaphylaxis and hypersensitivity, cardiac dysfunction, diarrhoea Grade ≥3, pregnancy-related AEs, interstitial lung disease, infusion-/administration-related reactions, mucositis, (febrile) neutropenia, rash/skin reactions, and suspected transmission of infectious agent. MedDRA version 22.1 was used to code AEs; preferred terms (PT) that are part of a given category are listed in the rows directly below each category within the results table.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE. TEAEs of special interest included LVEF decreased, liver enzymes (ALT or AST) increased, and suspected transmission of infectious agent by the study drug. MedDRA version 22.1 was used to code AEs; preferred terms (PT) that are part of a given category are listed in the rows directly below each category within the results table. If a participant experienced more than one event in a category, they were counted only once in that category.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE. TEAEs to monitor included anaphylaxis and hypersensitivity, cardiac dysfunction, diarrhoea Grade ≥3, pregnancy-related AEs, interstitial lung disease, infusion-/administration-related reactions, mucositis, (febrile) neutropenia, rash/skin reactions, and suspected transmission of infectious agent.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE. TEAEs to monitor included anaphylaxis and hypersensitivity, cardiac dysfunction, diarrhoea Grade ≥3, pregnancy-related AEs, interstitial lung disease, infusion-/administration-related reactions, mucositis, (febrile) neutropenia, rash/skin reactions, and suspected transmission of infectious agent.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE.

Treatment-emergent adverse events (TEAEs) were adverse events (AEs) that started or worsened in severity on or after the first administration of study drug, up to and including 28 days after the last dose. The investigator graded all AEs for severity per NCI-CTCAE v4.0; if not listed, the AE was assessed as follows: Grade 1 = mild; Grade 2 = moderate; Grade 3 = severe; Grade 4 = life-threatening/disabling; Grade 5 = death. The investigator determined whether an AE was related to study drug and independently assessed severity and seriousness of each AE.

Congestive heart failure was defined as the Standardised MedDRA Query (SMQ) 'Cardiac failure (wide)' from the Medical Dictionary for Regulatory Activities, version 22.1 (MedDRA version 22.1).

Congestive heart failure was defined as SMQ 'Cardiac failure (wide)' from the MedDRA version 22.1. Time to onset of the first episode of congestive heart failure was analyzed using a Kaplan-Meier approach. Participants who did not experience any congestive heart failure at the time of data-cut were censored at the date of the last attended visit whilst on-treatment (including visits up to and including 28 days after last dose of study treatment). Only treatment emergent congestive heart failure events are included.

All participants must have had a baseline LVEF ≥50% to enroll in the study; patients with significant cardiac disease or baseline LVEF below 50% were not eligible for this study. The change from baseline LVEF values were reported at every 3 cycles over the course of the study and at the final treatment, worst treatment, and maximum decrease values. The final treatment value was defined as the last LVEF value observed before all study treatment discontinuation. The worst treatment value was defined as the lowest LVEF value observed before all study treatment discontinuation. The maximum decrease value was defined as the largest decrease of LVEF value from baseline, or minimum increase if a participant's post-baseline LVEF measures were all larger than the baseline value.

All participants must have had a baseline LVEF greater than or equal to (≥)50% to enroll in the study; patients with significant cardiac disease or baseline LVEF below 50% were not eligible for this study. The number of participants are reported according to four change from baseline in LVEF value categories over the course of the study: 1) an increase or decrease from baseline LVEF less than (<)10% points or no change in LVEF; 2) an absolute LVEF value <45% points and a decrease from baseline LVEF ≥10% points to <15% points; 3) an absolute LVEF value <45% points and a decrease from baseline LVEF ≥15% points; or 4) an absolute LVEF value ≥45% points and a decrease from baseline LVEF ≥10% points. BL = baseline; Decr. = decrease; Incr. = increase

Clinical laboratory tests for hematology and coagulation parameters were performed at local laboratories. Laboratory toxicities were defined based on NCI-CTC v4.0 from Grades 1 (least severe) to 4 (most severe). Some laboratory parameters are bi-dimensional (i.e. can be graded in both the low and high direction). These parameters were split and presented in both directions. Baseline was defined as the last non-missing measurement taken prior to the first dose of study treatment (including unscheduled assessments). Values from all visits, including unscheduled visits, were included in the derivation of the worst post-baseline grade. Not every abnormal laboratory value qualified as an adverse event, only if it met any of the following criteria: was clinically significant (per investigator); was accompanied by clinical symptoms; resulted in a change in study treatment; or resulted in a medical intervention or a change in concomitant therapy.

Clinical laboratory tests for hematology and coagulation parameters were performed at local laboratories. Laboratory toxicities were defined based on local laboratory normal ranges (for parameters with NCI-CTC grade not defined). Some laboratory parameters are bi-dimensional (i.e. can be graded in both the low and high direction). These parameters were split and presented in both directions. Baseline was defined as the last non-missing measurement taken prior to the first dose of study treatment (including unscheduled assessments). Values from all visits, including unscheduled visits, were included in the derivation of the worst post-baseline grade. Not every abnormal laboratory value qualified as an adverse event, only if it met any of the following criteria: was clinically significant (per investigator); was accompanied by clinical symptoms; resulted in a change in study treatment; or resulted in a medical intervention or a change in concomitant therapy.

Clinical laboratory tests for biochemistry parameters were performed at local laboratories. Laboratory toxicities were defined based on NCI-CTC v4.0 from Grades 1 (least severe) to 4 (most severe). Some laboratory parameters are bi-dimensional (i.e. can be graded in both the low and high direction). These parameters were split and presented in both directions. Baseline was defined as the last non-missing measurement taken prior to the first dose of study treatment (including unscheduled assessments). Values from all visits, including unscheduled visits, were included in the derivation of the worst post-baseline grade. Not every abnormal laboratory value qualified as an adverse event, only if it met any of the following criteria: was clinically significant (per investigator); was accompanied by clinical symptoms; resulted in a change in study treatment; or resulted in a medical intervention or a change in concomitant therapy.

Clinical laboratory tests for biochemistry parameters were performed at local laboratories. Laboratory toxicities were defined based on local laboratory normal ranges (for parameters with NCI-CTC grade not defined). Some laboratory parameters are bi-dimensional (i.e. can be graded in both the low and high direction). These parameters were split and presented in both directions. Baseline was defined as the last non-missing measurement taken prior to the first dose of study treatment (including unscheduled assessments). Values from all visits, including unscheduled visits, were included in the derivation of the worst post-baseline grade. Not every abnormal laboratory value qualified as an adverse event, only if it met any of the following criteria: was clinically significant (per investigator); was accompanied by clinical symptoms; resulted in a change in study treatment; or resulted in a medical intervention or a change in concomitant therapy.

Progression-free survival (PFS) was defined as the time between the date of enrollment and the date of first radiographically documented progressive disease assessment (by the investigator using RECIST v1.1) or death, whichever occurred first. PFS was analyzed using a Kaplan-Meier approach. Participants who had neither progressed nor died at the time of clinical cut-off or who were lost to follow-up were censored at the date of the last evaluable tumor assessment (response assessment with the latest end date); if no post-baseline assessments were available, such participants were censored at Day 1. If a participant missed 2 or more consecutive visits, then they were censored at the last evaluable visit prior to the missed visits. Tumor assessments were performed every 3 cycles (1 cycle is 3 weeks) for up to 36 months and at least every 12 cycles thereafter during treatment, and at least every 36 weeks post-treatment (if progression-free after 36 months), until disease progression.

Progression-free survival (PFS) was defined as the time between the date of enrollment and the date of first radiographically documented progressive disease assessment (by the investigator using RECIST v1.1) or death, whichever occurred first. PFS was analyzed using a Kaplan-Meier approach. Participants who had neither progressed nor died at the time of clinical cut-off or who were lost to follow-up were censored at the date of the last evaluable tumor assessment (response assessment with the latest end date); if no post-baseline assessments were available, such participants were censored at Day 1. If a participant missed 2 or more consecutive visits, then they were censored at the last evaluable visit prior to the missed visits. Tumor assessments were performed every 3 cycles (1 cycle is 3 weeks) for up to 36 months and at least every 12 cycles thereafter during treatment, and at least every 36 weeks post-treatment (if progression-free after 36 months), until disease progression.

Progression-free survival (PFS) was defined as the time between the date of enrollment and the date of first radiographically documented progressive disease assessment (by the investigator using RECIST v1.1) or death, whichever occurred first. PFS was analyzed using a Kaplan-Meier approach. Participants who had neither progressed nor died at the time of clinical cut-off or who were lost to follow-up were censored at the date of the last evaluable tumor assessment (response assessment with the latest end date); if no post-baseline assessments were available, such participants were censored at Day 1. If a participant missed 2 or more consecutive visits, then they were censored at the last evaluable visit prior to the missed visits. Tumor assessments were performed every 3 cycles (1 cycle is 3 weeks) for up to 36 months and at least every 12 cycles thereafter during treatment, and at least every 36 weeks post-treatment (if progression-free after 36 months), until disease progression.

Progression-free survival (PFS) was defined as the time between the date of enrollment and the date of first radiographically documented progressive disease assessment (by the investigator using RECIST v1.1) or death, whichever occurred first. PFS was analyzed using a Kaplan-Meier approach. Participants who had neither progressed nor died at the time of clinical cut-off or who were lost to follow-up were censored at the date of the last evaluable tumor assessment (response assessment with the latest end date); if no post-baseline assessments were available, such participants were censored at Day 1. If a participant missed 2 or more consecutive visits, then they were censored at the last evaluable visit prior to the missed visits. Tumor assessments were performed every 3 cycles (1 cycle is 3 weeks) for up to 36 months and at least every 12 cycles thereafter during treatment, and at least every 36 weeks post-treatment (if progression-free after 36 months), until disease progression.

Progression-free survival (PFS) was defined as the time between the date of enrollment and the date of first radiographically documented progressive disease assessment (by the investigator using RECIST v1.1) or death, whichever occurred first. PFS was analyzed using a Kaplan-Meier approach. Participants who had neither progressed nor died at the time of clinical cut-off or who were lost to follow-up were censored at the date of the last evaluable tumor assessment (response assessment with the latest end date); if no post-baseline assessments were available, such participants were censored at Day 1. If a participant missed 2 or more consecutive visits, then they were censored at the last evaluable visit prior to the missed visits. Tumor assessments were performed every 3 cycles (1 cycle is 3 weeks) for up to 36 months and at least every 12 cycles thereafter during treatment, and at least every 36 weeks post-treatment (if progression-free after 36 months), until disease progression.

Progression-free survival (PFS) was defined as the time between the date of enrollment and the date of first radiographically documented progressive disease assessment (by the investigator using RECIST v1.1) or death, whichever occurred first. PFS was analyzed using a Kaplan-Meier approach. Participants who had neither progressed nor died at the time of clinical cut-off or who were lost to follow-up were censored at the date of the last evaluable tumor assessment (response assessment with the latest end date); if no post-baseline assessments were available, such participants were censored at Day 1. If a participant missed 2 or more consecutive visits, then they were censored at the last evaluable visit prior to the missed visits. Tumor assessments were performed every 3 cycles (1 cycle is 3 weeks) for up to 36 months and at least every 12 cycles thereafter during treatment, and at least every 36 weeks post-treatment (if progression-free after 36 months), until disease progression.

Progression-free survival (PFS) was defined as the time between the date of enrollment and the date of first radiographically documented progressive disease assessment (by the investigator using RECIST v1.1) or death, whichever occurred first. PFS was analyzed using a Kaplan-Meier approach. Participants who had neither progressed nor died at the time of clinical cut-off or who were lost to follow-up were censored at the date of the last evaluable tumor assessment (response assessment with the latest end date); if no post-baseline assessments were available, such participants were censored at Day 1. If a participant missed 2 or more consecutive visits, then they were censored at the last evaluable visit prior to the missed visits. Tumor assessments were performed every 3 cycles (1 cycle is 3 weeks) for up to 36 months and at least every 12 cycles thereafter during treatment, and at least every 36 weeks post-treatment (if progression-free after 36 months), until disease progression.

Progression-free survival (PFS) was defined as the time between the date of enrollment and the date of first radiographically documented progressive disease assessment (by the investigator using RECIST v1.1) or death, whichever occurred first. PFS was analyzed using a Kaplan-Meier approach. Participants who had neither progressed nor died at the time of clinical cut-off or who were lost to follow-up were censored at the date of the last evaluable tumor assessment (response assessment with the latest end date); if no post-baseline assessments were available, such participants were censored at Day 1. If a participant missed 2 or more consecutive visits, then they were censored at the last evaluable visit prior to the missed visits. Tumor assessments were performed every 3 cycles (1 cycle is 3 weeks) for up to 36 months and at least every 12 cycles thereafter during treatment, and at least every 36 weeks post-treatment (if progression-free after 36 months), until disease progression.

Overall survival was defined as time from the date of enrollment until the date of death due to any cause. Overall survival was analyzed using a Kaplan-Meier approach. Participants who had not died were censored at the last date they were known to be alive. When it was not possible to confirm the full death date, partial death dates were imputed to: 01 June of that year if only the year was known, 15th of that month if only the month and year were known. If the imputed date was before the last known alive date, the last known alive date was used as the imputation.

Overall survival was defined as time from the date of enrollment until the date of death due to any cause. Overall survival was analyzed using a Kaplan-Meier approach. Participants who had not died were censored at the last date they were known to be alive. When it was not possible to confirm the full death date, partial death dates were imputed to: 01 June of that year if only the year was known, 15th of that month if only the month and year were known. If the imputed date was before the last known alive date, the last known alive date was used as the imputation.

Overall survival was defined as time from the date of enrollment until the date of death due to any cause. Overall survival was analyzed using a Kaplan-Meier approach. Participants who had not died were censored at the last date they were known to be alive. When it was not possible to confirm the full death date, partial death dates were imputed to: 01 June of that year if only the year was known, 15th of that month if only the month and year were known. If the imputed date was before the last known alive date, the last known alive date was used as the imputation.

Overall survival was defined as time from the date of enrollment until the date of death due to any cause. Overall survival was analyzed using a Kaplan-Meier approach. Participants who had not died were censored at the last date they were known to be alive. When it was not possible to confirm the full death date, partial death dates were imputed to: 01 June of that year if only the year was known, 15th of that month if only the month and year were known. If the imputed date was before the last known alive date, the last known alive date was used as the imputation.

Overall survival was defined as time from the date of enrollment until the date of death due to any cause. Overall survival was analyzed using a Kaplan-Meier approach. Participants who had not died were censored at the last date they were known to be alive. When it was not possible to confirm the full death date, partial death dates were imputed to: 01 June of that year if only the year was known, 15th of that month if only the month and year were known. If the imputed date was before the last known alive date, the last known alive date was used as the imputation.

Overall survival was defined as time from the date of enrollment until the date of death due to any cause. Overall survival was analyzed using a Kaplan-Meier approach. Participants who had not died were censored at the last date they were known to be alive. When it was not possible to confirm the full death date, partial death dates were imputed to: 01 June of that year if only the year was known, 15th of that month if only the month and year were known. If the imputed date was before the last known alive date, the last known alive date was used as the imputation.

Overall survival was defined as time from the date of enrollment until the date of death due to any cause. Overall survival was analyzed using a Kaplan-Meier approach. Participants who had not died were censored at the last date they were known to be alive. When it was not possible to confirm the full death date, partial death dates were imputed to: 01 June of that year if only the year was known, 15th of that month if only the month and year were known. If the imputed date was before the last known alive date, the last known alive date was used as the imputation.

Overall survival was defined as time from the date of enrollment until the date of death due to any cause. Overall survival was analyzed using a Kaplan-Meier approach. Participants who had not died were censored at the last date they were known to be alive. When it was not possible to confirm the full death date, partial death dates were imputed to: 01 June of that year if only the year was known, 15th of that month if only the month and year were known. If the imputed date was before the last known alive date, the last known alive date was used as the imputation.

Overall survival was defined as time from the date of enrollment until the date of death due to any cause. Overall survival was analyzed using a Kaplan-Meier approach. Participants who had not died were censored at the last date they were known to be alive. When it was not possible to confirm the full death date, partial death dates were imputed to: 01 June of that year if only the year was known, 15th of that month if only the month and year were known. If the imputed date was before the last known alive date, the last known alive date was used as the imputation.

The overall response rate was defined as the percentage of participants with complete response (CR) or partial response (PR) as their best confirmed response (≥4 weeks later), as assessed by the investigator using RECIST v1.1 from the start of study treatment until disease progression/recurrence or death. Responses according to RECIST v1.1 are defined as follows: CR = Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 millimetres (mm).; PR = At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. Participants without post-baseline tumor assessments were considered non-responders.

Best overall response (BOR) was defined as the best response recorded from the first dose of study treatment until disease progression/recurrence or death in the absence of disease progression. The hierarchy used to determine BOR: Complete Response (CR)>Partial Response (PR)>Stable Disease (SD)>Progressive Disease (PD)>Not Evaluable. Note that CR or PR was confirmed ≥4 weeks later. RECIST v1.1 responses are defined as follows: CR = Disappearance of all target lesions. Any pathological lymph nodes (target or non-target) must have reduction in short axis to <10 millimetres (mm).; PR = At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum.; PD = At least 20% increase in sum of diameters of target lesions, taking as reference the smallest sum on study, and absolute increase of ≥5 mm.; SD = Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD, taking as reference the smallest sum diameters while on study.

The overall response rate was defined as the percentage of participants with complete response (CR) or partial response (PR) as their best confirmed response (≥4 weeks later), as assessed by the investigator using RECIST v1.1 from the start of study treatment until disease progression/recurrence or death. Responses according to RECIST v1.1 are defined as follows: CR = Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 millimetres (mm).; PR = At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. Participants without post-baseline tumor assessments were considered non-responders.

The overall response rate was defined as the percentage of participants with complete response (CR) or partial response (PR) as their best confirmed response (≥4 weeks later), as assessed by the investigator using RECIST v1.1 from the start of study treatment until disease progression/recurrence or death. Responses according to RECIST v1.1 are defined as follows: CR = Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 millimetres (mm).; PR = At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. Participants without post-baseline tumor assessments were considered non-responders.

The clinical benefit rate was defined as the percentage of participants whose best confirmed response (≥4 weeks later) was a complete response (CR) or partial response (PR), or stable disease (SD) that lasted at least 6 months, as assessed by the investigator using RECIST v1.1 from the start of study treatment until disease progression/recurrence or death. Clinical benefit responses according to RECIST v1.1 are defined as follows: CR = Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 millimetres (mm).; PR = At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.; SD = Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for progressive disease (PD; at least 20% increase in sum of diameters of target lesions and absolute increase of ≥5 mm), taking as reference the smallest sum diameters while on study.

Duration of response (DOR) was defined as the time from when a confirmed best overall response of complete response (CR) or partial response (PR) was first documented to first documented disease progression or death from any cause (whichever occurred first). DOR was analyzed using a Kaplan-Meier approach. Participants who had not progressed or died after having had a confirmed response were censored at the date of their last tumor measurement. Response was assessed every 3 cycles (1 cycle is 3 weeks) up to 36 months, and at least every 12 cycles thereafter until event occurrence or end of study. Responses according to RECIST v1.1 are defined as follows: CR = Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 millimetres (mm).; PR = At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Time to response (TTR) was defined as the time from the first study treatment administration to the date of first confirmed response (CR or PR). TTR was analyzed using a Kaplan-Meier approach. Participants who did not have CR or PR were censored at the date of their last evaluable tumor assessment. Participants for whom no post-baseline tumor assessments were available were censored at Day 1. Responses according to RECIST v1.1 are defined as follows: CR = Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 millimetres (mm).; PR = At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

The FACT-B questionnaire (version 4) was administered only to female participants to assess quality of life in five subscales: physical, social, emotional, and functional well-being, and breast cancer. Participants were given a series of statements in each subscale and were asked to rate how true each statement was for them during the past 7 days on a 5-point scale ranging from 0 (not at all) to 4 (very much). The calculated FACT-B total score, ranging from 0 to 148, was the sum of the scores for each subscale, provided that at least 80% of the items had been answered; a higher score indicated a better quality of life. If any of the 5 subscale scores were missing, the total score was also set to missing. Baseline was defined as the last non-missing measurement taken prior to first dose of study treatment (including unscheduled assessments). Post-baseline values were summarized for planned visits only.

The FACT-B questionnaire (version 4) was administered only to female participants to assess quality of life in five subscales: physical, social, emotional, and functional well-being, and breast cancer. For the physical well-being subscale, participants were given a series of 7 statements and were asked to rate how true each statement was for them during the past 7 days on a 5-point scale ranging from 0 (not at all) to 4 (very much). The calculated FACT-B physical well-being subscale score, ranging from 0 to 28, was the sum of the scores for each statement only if at least 50% of items had been answered; the higher the score, the better the quality of life. Baseline was defined as the last non-missing measurement taken prior to first dose of study treatment (including unscheduled assessments). Post-baseline values were summarized for planned visits only.

The FACT-B questionnaire (version 4) was administered only to female participants to assess quality of life in five subscales: physical, social, emotional, and functional well-being, and breast cancer. For the social well-being subscale, participants were given a series of 7 statements and were asked to rate how true each statement was for them during the past 7 days on a 5-point scale ranging from 0 (not at all) to 4 (very much). The calculated FACT-B social well-being subscale score, ranging from 0 to 28, was the sum of the scores for each statement only if at least 50% of items had been answered; the higher the score, the better the quality of life. Baseline was defined as the last non-missing measurement taken prior to first dose of study treatment (including unscheduled assessments). Post-baseline values were summarized for planned visits only.

The FACT-B questionnaire (version 4) was administered only to female participants to assess quality of life in five subscales: physical, social, emotional, and functional well-being, and breast cancer. For the emotional well-being subscale, participants were given a series of 6 statements and were asked to rate how true each statement was for them during the past 7 days on a 5-point scale ranging from 0 (not at all) to 4 (very much). The calculated FACT-B emotional well-being subscale score, ranging from 0 to 24, was the sum of the scores for each statement only if at least 50% of items had been answered; the higher the score, the better the quality of life. Baseline was defined as the last non-missing measurement taken prior to first dose of study treatment (including unscheduled assessments). Post-baseline values were summarized for planned visits only.

The FACT-B questionnaire (version 4) was administered only to female participants to assess quality of life in five subscales: physical, social, emotional, and functional well-being, and breast cancer. For the functional well-being subscale, participants were given a series of 7 statements and were asked to rate how true each statement was for them during the past 7 days on a 5-point scale ranging from 0 (not at all) to 4 (very much). The calculated FACT-B functional well-being subscale score, ranging from 0 to 28, was the sum of the scores for each statement only if at least 50% of items had been answered; the higher the score, the better the quality of life. Baseline was defined as the last non-missing measurement taken prior to first dose of study treatment (including unscheduled assessments). Post-baseline values were summarized for planned visits only.

The FACT-B questionnaire (version 4) was administered only to female participants to assess quality of life in five subscales: physical, social, emotional, and functional well-being, and breast cancer. For the breast cancer subscale, participants were given a series of 10 statements and were asked to rate how true each statement was for them during the past 7 days on a 5-point scale ranging from 0 (not at all) to 4 (very much). The calculated FACT-B breast cancer subscale score, ranging from 0 to 40, was the sum of the scores for each statement only if at least 50% of items had been answered; the higher the score, the better the quality of life. Baseline was defined as the last non-missing measurement taken prior to first dose of study treatment (including unscheduled assessments). Post-baseline values were summarized for planned visits only.

Safety Population