1. From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (YB and DSM); the Divisions of Cancer Epidemiology and Genetics (RSS, LJ, DTS, YP, MFL, AS, and DSM) and Cancer Control and Population Sciences (AFS), National Cancer Institute, Rockville, MD; AARP, Washington, DC (AH); and the Department of Epidemiology and Public Health, Imperial College London, United Kingdom (DSM