1. Division of Maternal Fetal Medicine Department of Obstetrics and Gynecology Vanderbilt University Medical Center Nashville Tennessee USA
2. Department of Obstetrics and Gynecology Monmouth Medical Center Long Branch New Jersy USA
3. Division of Maternal Fetal Medicine Department of Obstetrics and Gynecology Weill Cornell Medicine at New York Presbyterian Hospital New York New York USA
4. Division of Maternal Fetal Medicine Department of Obstetrics and Gynecology University of Miami Miami Florida USA
5. Division of Maternal Fetal Medicine Department of Obstetrics and Gynecology Jefferson University Philadelphia Pennsylvania USA
6. Department of Obstetrics and Gynecology Maimonides Medical Center Brooklyn New York USA