Affiliation: | 1. Department of Obstetrics and Gynecology, Barzilai Medical Center, Ben-Gurion University of the Negev, Ashkelon, Israel;2. Department of Obstetrics and Gynecology, Assaf Harophe Medical Center, University of Tel Aviv, Zerifin, Israel;3. Institute for Epidemiology Research, Barzilai Medical Center, Ben-Gurion University of the Negev, Ashkelon, Israel |