1. Department of Obstetrics and Gynecology; Faculty of Medicine; Menoufia University; Shebin-Elkom Egypt
2. Al-Hayat National Hospital; Khamis-Mushait Saudi Arabia
3. Department of Obstetrics and Gynecology; Faculty of Medicine; Ain-shams University; Cairo Egypt
4. Armed Forces Hospital North-West Region; Tabouk Saudi Arabia
5. Department of Public Health and Community Medicine; Menoufia University; Shebin-Elkom Egypt