1. Public Health Department, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
2. The Moshe Prywes Center for Medical Education, Ben-Gurion University of the Negev, P.O. Box 653, 84105 Beer-Sheva, Israel
3. Department of Obstetrics and Gynecology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel