1. Department of Obstetrics and Gynecology, Edith Wolfson Medical Center, Holon, Israel, , , Sackler School of Medicine,Tel Aviv University, Tel Aviv, Israel
2. Department of Obstetrics and Gynecology, Edith Wolfson Medical Center, Holon, Israel, Sackler School of Medicine,Tel Aviv University, Tel Aviv, Israel
3. Perinatal Division, Department of Obstetrics and Gynecology, Rabin Medical Center Beilinson Campus, Petah Tiqva, Israel, Sackler School of Medicine,Tel Aviv University, Tel Aviv, Israel
4. Department of Biochemistry, Edith Wolfson Medical Center, Holon, Israel
5. Epidemiology and Statistics Unit, Edith Wolfson Medcial Center, Holon, Israel, Sackler School of Medicine,Tel Aviv University, Tel Aviv, Israel
6. Department of Anesthesia, Edith Wolfson Medical Center, Holon, Israel, Sackler School of Medicine,Tel Aviv University, Tel Aviv, Israel