1. Department of Obstetrics and Gynecology, October 6th University, Cairo, Egypt;
2. Department of Obstetrics and Gynecology, Al-Azhar University, Cairo, Egypt;
3. Department of Obstetrics and Gynecology, Cairo University, Cairo, Egypt;
4. Department of Obstetrics and Gynecology, Al-Galaa Teaching Hospital, Cairo, Egypt;
5. Department of Pathology, Cairo University, Cairo, Egypt