1. From the Vanderbilt Epidemiology Center, Vanderbilt University Medical Center, Nashville, TN (WW, XOS, GY, HC, and WZ); the Department of Epidemiology, Shanghai Cancer Institute, People’s Republic of China (HL and Y-TG); and the Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Bethesda, MD (B-TJ).