1. Public Health Sciences Medical University of South Carolina Charleston South Carolina USA
2. Environmental and Occupational Health Indiana University Bloomington Indiana USA
3. Global and Community Health George Mason University Fairfax Virginia USA
4. Obstetrics and Gynecology Christiana Care Health System Newark Delaware USA
5. Obstetrics and Gynecology Northwestern University Feinberg School of Medicine Chicago Illinois USA
6. Obstetrics and Gynecology Medical University of South Carolina Charleston South Carolina USA
7. Obstetrics and Gynecology and Center for Women's Reproductive Health University of Alabama at Birmingham Birmingham Alabama USA
8. Obstetrics and Gynecology Miller Children's and Women's Hospital Long Beach California USA
9. Obstetrics and Gynecology Saint Peter's University Hospital New Brunswick New Jersey USA
10. Obstetrics and Gynecology New York Presbyterian Queens Hospital Queens New York USA
11. Eunice Kennedy Shriver National Institute of Child Health and Human Development National Institutes of Health Bethesda Maryland USA
12. Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine National University of Singapore Singapore
13. Biostatistics, Epidemiology and Informatics University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
14. Obstetrics and Gynecology Columbia University Medical Center New York New York USA