1. Department of Health Promotion, CAPHRI School for Public Health and Primary Care, Maastricht University, 6200 MD Maastricht, The Netherlands
2. Sudanese Public Health Association (SPHA), Khartoum 11111, Sudan
3. Department of Obstetrics and Gynecology, Unaizah College of Medicine and Medical Sciences, Qassim University, Unaizah 56219, Saudi Arabia
4. Department of Obstetrics and Gynecology, Omdurman Maternity Hospital, Khartoum 24983, Sudan