1. From Seoul National University Hospital, Cancer Research Institute, Seoul National University College of Medicine (S.-A.I.), the Yonsei Cancer Center, Yonsei University Health System (J.S.), and the Asan Medical Center, University of Ulsan College of Medicine (K.-H.J.), Seoul, and the Center for Breast Cancer, National Cancer Center, Gyeonggi-do (K.-S.L.) — all in South Korea; National Taiwan University Hospital, Taipei, Taiwan (Y.-S.L.); Massachusetts General Hospital Cancer Center and Harvard Medical...