1Massachusetts General Hospital Cancer Center and Harvard Medical School, Boston
2Vall d'Hebron Institute of Oncology, Barcelona
3Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine
4Division of Hematology and Medical Oncology, Department of Internal Medicine, Seoul National University College of Medicine
5Hospital Pérola Byington and Faculdade de Medicina da Universidade de São Paulo, São Paulo
6Division of Hematology and Medical Oncology, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine
7Leningrad Regional Oncology Dispensary, St Petersburg, Russia
8Centro de Pesquisas Médicas e Ensaios Clínicos–Mastology Unit of Conceição Hospital, Porto Alegre, Brazil
9Centrum Onkologii, Warsaw, Poland
10Roche, Welwyn, United Kingdom
11Genentech, South San Francisco, CA
12Washington Cancer Institute, MedStar Washington Hospital Center, Washington, DC