1. Department of Obstetrics and Gynecology, Hadassah University Hospital, Jerusalem, Israel;
2. Hematology Department, Hadassah, Hebrew University Medical Center, Jerusalem, Israel;
3. Department of Internal Medicine, Hematology Unit, Shaare Zedek Medical Center, Jerusalem, Israel;
4. Department of Obstetrics and Gynecology, Shaare Zedek Medical Center, Jerusalem, Israel