TACTIVE-U: A Study to Learn About the Study Medicine (Vepdegestrant) When Given With Other Medicines in People With Advanced or Metastatic Breast Cancer (Sub-Study A)

Istituto di Candiolo IRCCS - Fondazione del Piemonte per l'Oncologia, Candiolo

Clinica Universidad de Navarra, Madrid

Clínica Universidad de Navarra, Madrid

Hospital Universitario 12 de Octubre, Madrid

Clinica Universidad de Navarra, Pamplona

Moffitt Cancer Center - International Plaza, Tampa

Moffitt Cancer Center, Richard M. Shulze Family Foundation Outpatient Center, Tampa

Moffitt McKinley Hospital, Tampa

Hospital Universitario Virgen Del Rocio, Seville

Siteman Cancer Center - WUPI, Shiloh

Siteman Cancer Center - North County, Florissant

Barnes-Jewish Hospital, St Louis

Washington University School of Medicine - Siteman Cancer Center, St Louis

Washington University School of Medicine, St Louis

Siteman Cancer Center - South County, St Louis

Siteman Cancer Center - West County, Creve Coeur

Siteman Cancer Center - St Peters, City of Saint Peters

U.T. MD Anderson Cancer Center, Investigational Pharmacy Services - Unit 376, Houston

U.T. MD Anderson Cancer Center, Houston

University of Texas MD Anderson Cancer Center, Houston

UCSF Medical Center at Mission Bay, San Francisco

Stanford Women's Cancer Center, Palo Alto

Northwest Medical Specialties, PLLC, Federal Way

Northwest Medical Specialties, PLLC, Gig Harbor

Northwest Medical Specialties, PLLC, Puyallup

Northwest Medical Specialties, PLLC, Bonney Lake

Northwest Medical Specialties, PLLC, Tacoma

BC Cancer Vancouver, Vancouver

BC Cancer Vancouver, Vancouver

The Ottawa Hospital - General Campus, Ottawa

Sunnybrook Research Institute, Toronto

CIUSSS- saguenay-Lac-Saint-Jean, Chicoutimi

Jewish General Hospital, Montreal

Fondazione Policlinico Universitario Agostino Gemelli IRCCS - Università Cattolica del Sacro Cuore, Rome

Hospital Universitari Vall d'Hebron, Barcelona

Hospital Universitari Dexeus, Barcelona