1. Effective Care Research Unit, Department of Obstetrics and Gynaecology; Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Nnewi Campus; PMB 5001, Nnewi Nigeria
2. Division of Maternal Fetal Medicine, Department of Gynecology and Obstetrics; Johns Hopkins University School of Medicine; Baltimore Maryland USA
3. Obstetrics and Gynaecology; Delta State University Teaching Hospital; Oghara Nigeria
4. Department of Obstetrics and Gynaecology; Nnamdi Azikiwe University Teaching Hospital; Nnewi Nigeria
5. Measurement and Evaluation; Nnamdi Azikiwe University; Awka Nigeria