1. Department of Obstetrics and Gynecology, the Yitzhak Shamir Medical Center (formerly Assaf Harofeh Medical Center), Zerifin, Israel;
2. Department of Obstetrics and Gynecology, Wolfson Medical Center, Holon, Israel (both affiliated with the Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel);
3. Department of Obstetrics and Gynecology, Assuta Hospital, Ashdod, Israel (affiliated to University of the Negev, Beer-Sheva, Ben-Gurion, Israel)