1. Department of Obstetrics and Gynecology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
2. Medical School, Hebrew University, Jerusalem, Israel
3. The Department of Obstetrics and Gynecology, the Chaim Sheba Medical Center, Ramat-Gan, Israel, Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
4. Department of Neonatology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel