1. Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 6710B Rockledge Drive, MSC 7004, Bethesda, MD 20892, USA
2. Department of Epidemiology and Environmental Health, University at Buffalo, 410 Kimball Tower, Buffalo NY 14214, USA
3. Department of Family and Preventive Medicine, Division of Public Health, University of Utah School of Medicine, 375 Chipeta Way Ste. A, Salt Lake City, UT, 84108, USA
4. Department of Nutrition, Harvard T.H. Chan School of Public Health, 655 Huntington Ave., Building II, 3rd Floor, Boston, MA 02115, USA
5. Program in Reproductive and Adult Endocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, 10 Center Drive, Bethesda, MD 20892, USA