1. Department of Environmental Health, and
2. Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts, USA
3. Department of Obstetrics, Gynecology, and Reproductive Biology, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
4. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, USA
5. Comparative Biosciences, University of Illinois at Urbana–Champaign, Urbana, Illinois, USA
6. National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
7. Vincent Memorial Obstetrics and Gynecology Service, Massachusetts General Hospital, Boston, Massachusetts, USA