1. Department of Physiology/Obstetrics and Gynaecology, College of Medicine, University of Nigeria, Enugu, Nigeria.
2. Department of Reproductive Physiology, College of Medicine, University of Nigeria, Enugu, Nigeria.
3. Department of Obstetrics and Gynaecology, Enugu State University Teaching Hospital, Enugu, Nigeria.
4. Department of Obstetrics and Gynaecology, Ebonyi State University Teaching Hospital, Abakiliki, Nigeria.
5. Department of Obstetrics and Gynaecology, Federal Medical Center, Abakiliki, Nigeria.