1. Department of Obstetrics and Gynecology, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA, U.S.A;
2. Department of Obstetrics and Gynecology, Reading Hospital, West Reading, PA, U.S.A;
3. Department of Internal Medicine, Reading Hospital, West Reading, PA, U.S.A;
4. Department of Internal Medicine, Jefferson Medical College of Thomas Jefferson University, Philadelphia, PA, U.S.A