Saint-Antoine Hospital, INSERM, Unité Mixte de Recherche Scientifique 938, and SIRIC CURAMUS, Sorbonne University, Paris, France. GINECO and Institut de Cancerologie de l'Ouest, Centre René Gauducheau, Saint-Herblain, France. European Institute of Oncology, IRCCS, Milan, Italy. Department of Medical Oncology and Hemato-Oncology, University of Milano, Milan, Italy. Department of Medical Oncology, Institut Paoli-Calmettes, CRCM, INSERM, CNRS, Aix-Marseille University, Marseille, France. BC Cancer-Vancouver, Vancouver, British Columbia, Canada. Vall d'Hebron University Hospital and Vall d'Hebron Institute of Oncology, Barcelona, Spain. BC Cancer-Kelowna, Kelowna, British Columbia, Canada. Ordinario di Oncologia Medica Direttore Scuola di Specialità in Oncologia Medica Università di Milano, Direttore Dipartimento Oncologia e Ematoncologia Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy. Sarah Cannon Research Institute UK Limited, London, United Kingdom. Medical Oncology Department, Hospital Virgen de la Victoria IBIMA, Malaga, Spain. Clinical Trials Unit, Instituto Nazionale Tumori, IRCCS, Fondazione "G. Pascale," Naples, Italy. Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom. START Madrid FJD, Hospital Fundación Jiménez Díaz, Madrid, Spain. Centre de Lutte Contre le Cancer-Centre Oscar Lambret, Lille, France. Department of Medical Oncology, Hôpital Européen Georges-Pompidou, Institut du Cancer Paris CARPEM, AP-HP Centre-Université Paris Cité, Paris, France. Gynecologic Oncology Division, Centre Hospitalier de l'Université de Montréal (CHUM), Centre de Recherche du CHUM, and Université de Montréal, Montreal, Quebec, Canada. University College London, St Bartholomew's Hospital London, London, United Kingdom. NEXT Oncology Hospital Universitario Quirónsalud Madrid, Madrid, Spain. Department of Medical Oncology, Hospital Universitario Miguel Servet and IIS Aragon, Zaragoza, Spain. Division of Gynecologic Oncology, McGill University Health Centre, Montreal, Quebec, Canada. Division of Gynecologic Oncology, Levine Cancer Institute, Atrium Health, Charlotte, North Carolina. GSK, Pennington, New Jersey. GSK, Waltham, Massachusetts. GSK, Hertfordshire, United Kingdom. GSK, London, United Kingdom. The Royal Marsden NHS Foundation Trust and Institute of Cancer Research, London, United Kingdom.