1. Department of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, Reproductive Biology and Medicine Branch, The Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
2. Department of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences, Bethesda, Maryland
3. Department of Obstetrics and Gynecology, Duke University School of Medicine, Durham, North Carolina
4. Department of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, , Reproductive Biology and Medicine Branch, The Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland