1. Department of Obstetrics and Gynaecology, University of Witwatersrand; Department of Obstetrics and Gynaecology, Mediclinic Private Hospital; PO Box 15184 Nelspruit Mpumalanga South Africa 1200
2. 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