1 Department of Obstetrics and Gynecology, Barzilai Medical Center Ashkelon Israel, Affiliated to the Goldman Medical School, Ben-Gurion University, Beer Sheva, Israel.
2 Department of Obstetrics and Gynecology, Carmel Medical Center, Affiliated to Technion, Israel Institute of Technology, Haifa, Israel.
3 Department of Obstetrics and Gynecology, Carmel Medical Center, Affiliated to Technion, Israel Institute of Technology, Haifa, Israel. Electronic address: segevyakir@yahoo.com.