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 Gynecology and Obstetrics; 600 N Wolfe Street Phipps 228 Baltimore Maryland USA 21287-1228
3. Faculty of Clinical medicine, College of Medicine, Anambra State University Amaku; Department of Obstetrics and Gynaecology; Awka Nigeria
4. Nnamdi Azikiwe University Teaching Hospital; Department of Obstetrics/Gynaecology; Nnewi Nigeria
5. University of Nigeria Enugu Campus/University of Nigeria Teaching Hospital Ituko-Ozalla; Obstetrics and Gynaecology; Enugu Nigeria 400001
6. Tabitha Medical Centre; Department of Pathology; Abuja Nigeria 400001