1. Department of Obstetrics and Gynaecology, Faculty of Clinical Sciences, College of Medicine, University College Hospital, University of Ibadan, Nigeria
2. Institute of Advanced Medical Research and Training, College of Medicine, University of Ibadan, Nigeria
3. United Nations Population Fund (UNFPA), Abuja, Nigeria
4. Department of Women’s Health, University College London Hospitals, London, UK
5. Department of Epidemiology and Medical Statistics, Faculty of Public Health, University of Ibadan, Nigeria