1. Department of Obstetrics and Gynecology, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
2. Department of Obstetrics and Gynecology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
3. Department of Obstetrics and Gynecology, Faculty of Medicine, Al-Azhar University, Assiut, Egypt
4. Department of Obstetrics and Gynecology, Faculty of Medicine, Al-Azhar University for Girls, Cairo, Egypt
5. Kasralainy, Faculty of Medicine, Cairo University, Cairo, Egypt
6. Department of Obstetrics and Gynecology, Faculty of Medicine, Assiut University, Assiut, Egypt
7. Department of Obstetrics and Gynecology, Faculty of Medicine, Fayoum University, Fayoum, Egypt