1. Department of Obstetrics and Gynecology, Faculty of Medicine, Fayoum University, Fayoum, Egypt
2. Department of Family Medicine, Sebasticook Valley Hospital, Pittsfield, ME, USA
3. Department of Epidemiology and Biostatistics, School of Public Health, Jackson State University, Jackson, MS, USA
4. Department of Obstetrics and Gynecology, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
5. Department of Obstetrics and Gynecology, Al-Yamamah Hospital, Riyadh, Saudi Arabia
6. Department of Obstetrics and Gynecology, Alfaisal University, Riyadh, Saudi Arabia
7. Department of Obstetrics and Gynecology, Faculty of Medicine, Al-Azhar University, Assiut, Egypt
8. Kasralainy, Faculty of Medicine, Cairo University, Cairo, Egypt
9. Department of Obstetrics and Gynaecology, Faculty of Medicine, Assiut University, Asyut, Egypt