1. Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Maimonides Medical Center, Brooklyn, New York
2. Department of Obstetrics and Gynecology, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York
3. Division of Maternal-Fetal Medicine, Southside Hospital, Bay Shore, New York
4. Department of Obstetrics and Gynecology, SUNY Downstate Medical Center, Brooklyn, New York