1. Maternal and Child Health Program Burnet Institute Melbourne Vic. Australia
2. Department of Obstetrics and Gynaecology University College Hospital Ibadan Oyo State Nigeria
3. Department of Obstetrics and Gynaecology University of Ilorin Teaching Hospital Ilorin Kwara State Nigeria
4. Department of Obstetrics and Gynaecology Lagos University Teaching Hospital Idi Araba Lagos State Nigeria
5. UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP) Department of Reproductive Health and Research World Health Organization Geneva Switzerland