1. Department of Obstetrics and Gynecology, Assaf Harofeh Medical Center, Zerifin, Israel, affiliated with the Sackler School of Medicine; Tel-Aviv University; Tel-Aviv Israel
2. Department of Obstetrics and Gynecology, Haemek Medical Center, Afula, Faculty of Medicine in the Galilee; Bar-Ilan University; Safed Israel
3. Women Health Center Clalit; Afula Israel
4. Department of Obstetrics and Prenatal Medicine; University Medical School; Bonn Germany
5. Centre de Procreation FERTILYS; Laval Quebec Canada