1. Department of Global and Community Health, George Mason University, Fairfax, Virginia, USA
2. Department of Public Health Sciences, Medical University of South Carolina, Charleston, South Carolina, USA
3. Department of Obstetrics and Gynecology, Medical University of South Carolina, Charleston, South Carolina, USA
4. Department of Pediatrics, Medical University of South Carolina, Charleston, South Carolina, USA
5. Department of Obstetrics and Gynecology, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
6. Department of Obstetrics and Gynecology, Christiana Care Health System, Newark, Delaware, USA
7. Department of Obstetrics and Gynecology, New York-Presbyterian Queens Hospital, Queens, New York, USA