1. Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Nnewi Campus; Effective Care Research Unit, Department of Obstetrics and Gynaecology; PMB 5001, Nnewi Anambra State Nigeria
2. Johns Hopkins University School of Medicine; Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology; 600 N Wolfe Street Phipps 228 Baltimore, MD Maryland USA 21287-1228
3. Delta State University Teaching Hospital; Obstetrics and Gynaecology; PMB 07 Oghara Delta Nigeria
4. Nnamdi Azikiwe University Teaching Hospital; Department of Obstetrics and Gynaecology; PMB Nnewi Anambra Nigeria 5025
5. Nnamdi Azikiwe University; Measurement and Evaluation; PMB 5025 Awka Anambra Nigeria