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    A clinical trial to compare GDC-9545 with a doctor’s choice of hormonal therapy in people with advanced or metastatic breast cancer after previous treatment has not worked.

    A Study Evaluating the Efficacy and Safety of GDC-9545 Compared With Physician's Choice of Endocrine Monotherapy in Participants With Previously Treated Estrogen Receptor-Positive, HER2-Negative Locally Advanced or Metastatic Breast Cancer

    • Cancer
    • Breast Cancer
    • Breast Cancer Er-Positive
    • Locally Advanced or Metastatic Breast Cancer
    • Estrogen Receptor (ER)-Positive
    • Breast Cancer HER-2 Negative