1. University of Michigan Medical School, University of Michigan, Ann Arbor
2. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor
3. School of Public Health, University of Michigan, Ann Arbor
4. Department of Emergency Medicine, Henry Ford Hospital, Detroit, Michigan
5. Division of Women’s Health, Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor