1. Division of General Pediatrics, Boston University School of Medicine, Boston, Massachusetts.
2. Channing Laboratory, Department of Medicine, Brigham & Women's Hospital/Harvard Medical School, Boston, Massachusetts.
3. Department of Epidemiology, Harvard University School of Public Health, Boston, Massachusetts.
4. Connors Center for Women's Health and Gender Biology, Brigham & Women's Hospital, Boston, Massachusetts.
5. Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts.
6. Obstetrics and Gynecology Epidemiology Center, Department of Obstetrics, Gynecology and Reproductive Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
7. Department of Epidemiology, University of Texas MD Anderson Cancer Center, Houston, Texas.
8. Department of Pediatrics, Baylor College of Medicine, Houston, Texas.
9. Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts.