1. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia
2. Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia
3. Department of Gynecology and Obstetrics, School of Medicine, Emory University, Atlanta, Georgia
4. Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
5. Department of Obstetrics and Gynecology, Columbia University Medical Center, New York, New York
6. Department of Obstetrics and Gynecology, School of Medicine, University of Virginia, Charlottesville, Virginia
7. Department of Obstetrics and Gynecology, University of Texas Medical Branch at Galveston, University of Texas, Galveston, Texas
8. Department of Obstetrics and Gynecology, School of Medicine, University of Utah, Salt Lake City, Utah
9. Department of Women’s Health, Dell Medical School, University of Texas at Austin, Austin, Texas