1 Department of Obstetrics and Gynecology, Lis Maternity Hospital, Tel Aviv Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
2 Department of Obstetrics and Gynecology, Lis Maternity Hospital, Tel Aviv Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. Electronic address: elir@tasmc.health.gov.il.