1. Faculty of Health Sciences, Joyce and Irving Goldman Medical School, Ben Gurion University of the Negev, Beer-Sheva, Israel
2. Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
3. Department of Public Health, Ben-Gurion University of the Negev, Beer-Sheva, Israel
4. Department of Obstetrics and Gynecology, Hadassah Mt. Scopus Medical Center, Jerusalem, Israel