Affiliation: | Johns Hopkins Bloomberg School of Public Health, Baltimore, MD;From the Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL (M.M., X.W., I.B.); Jefferson County Department of Health, Birmingham, AL (M.F.); Madison County Health Department, Huntsville, AL (L.R.); Contraception and Reproductive Health Branch, National Institute of Child Health and Human Development, Bethesda, MD (J.K.); and Division of Reproductive Health, National Center for Health Promotion and Disease Prevention, Centers for Disease Control and Prevention, Atlanta, GA (C.J.);From the Epidemiology Branch, Health Information Centre, Department of Health, Western Australia, Australia (P.J.S.); Department of Epidemiology & Biostatistics, School of Public Health, Curtin University of Technology, Perth, Australia (A.H.L.); and Department of Management Sciences, City University of Hong Kong, Hong Kong, China (K.K.Y).;From the Centers for Disease Control and Prevention, Hyattsville, MD;Surveillance and Risk Assessment Division, Centre for Chronic Disease Prevention and Control, Population and Public Health Branch, Health Canada, 120 Colonnade Road 6702A, AL: 6702A, Ottawa, Ont., Canada K1A 0K9;From STUK – Radiation and Nuclear Safety Authority, Helsinki, Finland (A.L., A.A.); and Tampere School of Public Health, University of Tampere, Tampere, Finland (T.S., A.A.);From the Department of Epidemiology and Biostatistics, Loma Linda University, Loma Linda, CA |