1. Department of Obstetrics & Gynecology, University of Washington School of Medicine, Seattle
2. Department of Health Services, University of Washington School of Public Health, Seattle
3. Department of Epidemiology, University of Washington School of Public Health, Seattle
4. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Michigan Medical School, Ann Arbor
5. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill
6. Carolina Population Center, University of North Carolina at Chapel Hill
7. UNC Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill