1. Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
2. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
3. Christiana Care Health System, Newark, Delaware
4. Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
5. Division of Maternal-Fetal Medicine, Department of Obstetrics-Gynecology, University of California School of Medicine, Irvine
6. Fountain Valley Regional Hospital and Medical Center, Fountain Valley, California
7. Department of Obstetrics and Gynecology, Medical University of South Carolina, Charleston
8. Department of Obstetrics and Gynecology, Columbia University Medical Center, New York, New York
9. Department of Obstetrics and Gynecology, New York-Presbyterian Hospital/Queens, Queens
10. Department of Obstetrics and Gynecology, Miller Children’s Hospital/Long Beach Memorial Medical Center, Long Beach, California
11. Division of Maternal and Fetal Medicine, Department of Obstetrics and Gynecology, St Peter’s University Hospital, New Brunswick, New Jersey
12. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology University of Alabama School of Medicine, Birmingham
13. Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Women and Infants Hospital of Rhode Island, Providence
14. Department of Obstetrics and Gynecology, Tufts Medical Center, Boston, Massachusetts