1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Washington University in St. Louis School of Medicine, St. Louis, MO, USA
2. Washington University in St. Louis School of Medicine, St. Louis, MO, USA
3. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT, USA
4. Hadassah University Medical Center, Jerusalem, Israel