1. Department of Obstetrics and Gynaecology, University of Benin Teaching Hospital, Benin City, Edo State, Nigeria
2. Department of Obstetrics and Gynaecology, Federal Medical Centre, Umuahia, Abia State
3. Department of Obstetrics and Gynaecology, University of Benin Teaching Hospital, Benin City, Edo State
4. Mater Misericordiae Hospital, Afikpo, Ebonyi State, Nigeria