1. Departments of Obstetrics and Gynecology, Wake Forest University School of Medicine, Center of Research for Obstetrics and Gynecology, Forest University School of Medicine, Winston-Salem, North Carolina,
2. Departments of Obstetrics and Gynecology, Wake Forest University School of Medicine, Center of Research for Obstetrics and Gynecology, Forest University School of Medicine, Winston-Salem, North Carolina
3. Departments of Obstetrics and Gynecology, Wake Forest University School of Medicine, Department of Physiology and Pharmacology, Wake Forest University School of Medicine, Center of Research for Obstetrics and Gynecology, Forest University School of Medicine, Winston-Salem, North Carolina