1. Faculty of Medicine, University of Khartoum, Khartoum, Sudan
2. Department of Obstetrics and Gynecology, Faculty of Medicine, Umm Al-Qura University, Mekkah, Saudi Arabia
3. Faculty of Public Health and Health Informatics, Umm Al-Qura University, Mekkah, Saudi Arabia
4. Faculty of Medicine, Gadarif University, Gadarif, Sudan
5. Department of Obstetrics and Gynecology, Unaizah College of Medicine and Medical Sciences, Qassim University, Unaizah, Saudi Arabia