1. Departments of Epidemiology, Harvard School of Public Health, Boston, MA
2. Nutrition, Harvard School of Public Health, Boston, MA
3. Channing Division of Network Medicine, Department of Medicine, Harvard Medical School, Boston, MA
4. Obstetrics and Gynecology Epidemiology Center, Department of Obstetrics, Gynecology, and Reproductive Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA