Affiliations of authors: Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD (LAB, MBC, RTF, JHL); Section on Environment and Radiation, International Agency for Research on Cancer, Lyon, France (VM); Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Ontario, Canada (KCJ); Department of Oncology, Lund University, Lund, Sweden (HO); Department of Preventive Medicine, University of Southern California, Los Angeles, CA (JTC, BEH, MCP, GU); Division of Genetics and Epidemiology, The Institute of Cancer Research, Sutton, UK (RC, AJS); Epidemiology Research Program, American Cancer Society, Atlanta, GA (SMG, MMG); Department of Medicine (JMG), Obstetrics and Gynecology Epidemiology Center, Department of Obstetrics, Gynecology and Reproductive Biology (KBM), and Divisions of Preventive Medicine and Aging (HDS), Brigham and Women's Hospital, Boston, MA; MAVERIC, VA Boston Healthcare System, Boston, MA (JMG); Department of Surgery, Aretaieion University Hospital, Athens, Greece (GG); Center for Research in Epidemiology and Population Health, INSERM Unit 1018, Paris-Sud University, Villejuif, France (PG); AARP Research, AARP, Washington, DC (AH); Cancer Prevention Institute of California, Freemont, CA (AWH); Division of Epidemiology, Department of Health Research and Policy, and Stanford Cancer Institute, Stanford School of Medicine, Stanford University, Palo Alto, CA (AWH); Cancer Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI (LNK); Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC (CI); Department of Epidemiology (KBM) and Department of Nutrition (WCW), Harvard School of Public Health, Boston, MA (KBM); Istituto di Richerche Farmacologiche, Milan, Italy (EN, DT); IMS, Inc, Rockville, MD (DP, KS); Department of Hygiene, Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece (ETP); School of Public Health, Imperial C