1. Department of Gynecologic Surgery and Obstetrics, Uniformed Services University, Bethesda, MD 20814, USA
2. Department of Obstetrics, Gynecology, and Reproductive Sciences, UPMC Magee-Womens Hospital, Pittsburgh, PA 15213, USA
3. Department of Obstetrics and Gynecology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA