1. Department of Anesthesiology, New York Medical College, Westchester Medical Center, 100, Woods Road, Valhalla, New York 10595, USA
2. Department of Obstetrics and Gynecology, New York Medical College, Westchester Medical Center, 100, Woods Road, Valhalla, New York 10595, USA
3. Department of Surgery, New York Medical College, Westchester Medical Center, 100, Woods Road, Valhalla, New York 10595, USA