1. University of Lagos; Department of Obstetrics and Gynaecology; College of Medicine Surulere Lagos Nigeria PMB 12003
2. Effective Care Research Unit; Private Bag X9047 East London South Africa 5201
3. University of the Witwatersrand, University of Fort Hare, Eastern Cape Department of Health; Department of Obstetrics and Gynaecology, East London Hospital Complex; Frere and Cecilia Makiwane Hospitals Private Bag X 9047 East London Eastern Cape South Africa 5200