1. Effective Care Research Unit, Department of Obstetrics and Gynecology; Nnamdi Azikiwe University; Nnewi Campus Nnewi Nigeria
2. Department of Obstetrics and Gynecology; Nnamdi Azikiwe University; Nnewi Nigeria
3. Department of Obstetrics and Gynecology; University of Nigeria Teaching Hospital; Ituku-Ozalla Enugu Nigeria
4. Division of Maternal Fetal Medicine, Obstetrics and Gynecology; Johns Hopkins University School of Medicine; Baltimore Maryland USA
5. Department of Obstetrics and Gynecology; Chukwuemeka Odumegwu Ojukwu University Teaching Hospital; Awka Nigeria
6. Department of Obstetrics and Gynecology; Federal Medical Center; Umuahia Nigeria
7. Department of Obstetrics and Gynecology; ESUT Teaching Hospital; Parklane Enugu Nigeria