1. Department of Obstetrics & Gynecology, Catholic Maternity Hospital, PMB 104, Moniaya, Ogoja, Cross-Rivers State, Nigeria
2. Department of Obstetrics & Gynecology, Federal Teaching Hospital, PMB 102, Abakaliki, Ebonyi State, Nigeria
3. Department of Obstetrics & Gynecology, University of Nigeria Teaching Hospital, PMB 01129, Enugu State, Enugu 400001, Nigeria
4. Department of Obstetrics & Gynecology, Dalhatu Araf Specialist Hospital, PMB 007, Lafia, Nasarawa State, Nigeria