1 Department of Gynecology & Obstetrics, Ziv Medical Center, Azrieli Faculty of Medicine, Bar-Ilan University, Rambam St., Safed 13100, Israel. Electronic address: david.p@ziv.health.gov.il.
2 Department of Gynecology & Obstetrics, Ziv Medical Center, Azrieli Faculty of Medicine, Bar-Ilan University, Rambam St., Safed 13100, Israel.
3 Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk, VA.