1. Department of Epidemiology; Richard M. Fairbanks School of Public Health, Melvin & Bren Simon Cancer Center, Indiana University; Indianapolis IN
2. Department of Dermatology; Stanford University School of Medicine; Stanford CA
3. Department of Epidemiology and Biostatistics, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Breast Cancer Prevention and Therapy; Ministry of Education, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital; Tianjin China