1. Institute of Maternal and Child Health, College of Medicine, University of Nigeria, Ituku-Ozalla Campus, Enugu, Nigeria
2. Department of Obstetrics and Gynaecology, University of Nigeria Teaching Hospital, Ituku-Ozalla, Enugu, Nigeria
3. Department of Obstetrics and Gynaecology, Faculty of Medical Sciences, College of Medicine, University of Nigeria, Ituku-Ozalla Campus, Enugu, Nigeria