Secondary Outcome(s)
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EuroQoL 5-Dimension 5-Level Questionnaire (EQ-5D-5L) Score
[Time Frame: Baseline up to approximately 8 years]
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Healthcare Resource Utilization - Indirect Disease Related Cost
[Time Frame: Baseline up to approximately 8 years]
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Healthcare Resource Utilization - Percentage of Participants With Outpatient Visit
[Time Frame: Baseline up to approximately 8 years]
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Healthcare Resource Utilization - Number of Working Hours Missed Among Informal Caregivers due to Disease-Related Caregiving Responsibilities
[Time Frame: Baseline up to approximately 8 years]
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Healthcare Resource Utilization - Total Healthcare Cost
[Time Frame: Baseline up to approximately 8 years]
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Overall Survival (OS)
[Time Frame: From the date of initiation of treatment to the date of death from any cause (up to approximately 8 years)]
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Functional Assessment of Cancer Therapy-Breast (FACT-B) Questionnaire Score
[Time Frame: Baseline up to approximately 8 years]
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Healthcare Resource Utilization - Percentage of Participants With Emergency Room Visit
[Time Frame: Baseline up to approximately 8 years]
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Work Productivity and Activity Impairment-General Health (WPAI-GH) Questionnaire Score
[Time Frame: Baseline up to approximately 8 years]
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Healthcare Resource Utilization - Cost of Disease Related Out-of-Pocket Healthcare Expenditures
[Time Frame: Baseline up to approximately 8 years]
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Healthcare Resource Utilization - Length of Hospitalization
[Time Frame: Baseline up to approximately 8 years]
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Number of Treatment Regimens Received
[Time Frame: Baseline up to approximately 8 years]
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Duration of Response (DOR)
[Time Frame: From date of first response (CR or PR) to the date of disease progression (up to approximately 8 years)]
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Healthcare Resource Utilization - Percentage of Participants Receiving Monetary Social Benefits
[Time Frame: Baseline up to approximately 8 years]
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Healthcare Resource Utilization - Percentage of Participants Who Are Hospitalized
[Time Frame: Baseline up to approximately 8 years]
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Percentage of Participants by Reasons for Treatment Modification
[Time Frame: Baseline up to approximately 8 years]
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Percentage of Participants With HER2 Overexpression, as Assessed Using In Situ Hybridization or Immunohistochemistry
[Time Frame: Baseline up to approximately 8 years]
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Percentage of Participants Receiving Each Treatment Regimen, by Country/Region
[Time Frame: Baseline up to approximately 8 years]
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Percentage of Participants Receiving Each Treatment Regimen, by Participant Characteristics
[Time Frame: Baseline up to approximately 8 years]
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Percentage of Participants With Adverse Events (AEs) and Serious AEs (SAEs)
[Time Frame: Baseline up to approximately 8 years]
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Percentage of Participants With Complete Response (CR) or Partial Response (PR) - Objective Response Rate (ORR)
[Time Frame: From the date of initiation of treatment to the date of disease progression or death from any cause (up to approximately 8 years)]
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Percentage of Participants With HER2 Retesting
[Time Frame: Baseline up to approximately 8 years]
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