1. Department of Obstetrics and Gynaecology Federal Medical Centre Birnin Kebbi Nigeria
2. Department of Obstetrics and Gynaecology College of Medicine University of Lagos Lagos Nigeria
3. Department of Obstetrics and Gynaecology Bayero University Kano Nigeria
4. Department of Obstetrics and Gynaecology Federal Medical Centre Birnin Kudu Nigeria
5. Department of Obstetrics and Gynaecology Ahmadu Bello University Teaching Hospital Shika Nigeria
6. Department of Obstetrics and Gynaecology Usmanu Danfodiyo University Sokoto Nigeria
7. Department of Obstetrics and Gynaecology University of Abuja Teaching Hospital Gwagwalada Nigeria
8. UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research Development and Research Training in Human Reproduction (HRP) Department of Reproductive Health and Research World Health Organization Geneva Switzerland