Estrogen Receptor-positive Breast Cancer

• Dana-Farber Cancer Institute — Boston, Massachusetts, United States

• Harris Health System - Smith Clinic — Houston, Texas, United States
• O'Quinn Medical Tower - McNair Campus - Dan L Duncan Comprehensive Cancer Center — Houston, Texas, United States

• Vanderbilt-Ingram Cancer Center — Nashville, Tennessee, United States

• Anchorage Associates in Radiation Medicine — Anchorage, Alaska, United States
• Anchorage Radiation Therapy Center — Anchorage, Alaska, United States
• Alaska Breast Care and Surgery LLC — Anchorage, Alaska, United States
• Alaska Oncology and Hematology LLC — Anchorage, Alaska, United States

• Ohio State University Comprehensive Cancer Center — Columbus, Ohio, United States

• Barts Health NHS Trust — London, United Kingdom

• Duke University Medical Center — Durham, North Carolina, United States

Not specified

• City of Hope Medical Center — Duarte, California, United States

• California Cancer Care — Greenbrae, California, United States
• Moores UCSD Cancer Center — La Jolla, California, United States
• Scripps Health — La Jolla, California, United States
• University of Colorado — Aurora, Colorado, United States