Affiliation: | 1. Department of Epidemiology and Biostatistics, The Milken Institute School of Public Health at The George Washington University, Washington, D.C. 20052, U.S.A.;2. Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland 20817, U.S.A.;3. Biostatistics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, Maryland 20850, U.S.A. |