1. Department of Epidemiology, University of Michigan, Ann Arbor, Michigan, USA.
2. Department of Otolaryngology, University of Michigan, Ann Arbor, Michigan, USA.
3. Reproductive Endocrinology Clinic, Center for Reproductive Medicine, University of Michigan, Ann Arbor, Michigan, USA.
4. School of Social Work, University of Michigan, Ann Arbor, Michigan, USA.
5. Department of Women's and Gender Studies, University of Michigan, Ann Arbor, Michigan, USA.