1. Walter Sisulu University; Department of Obstetrics and Gynaecology, East London Hospital Complex; Private Bag X9047 East London South Africa 5200
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
3. Stellenbosch University and Tygerberg Hospital; Department of Obstetrics and Gynaecology, Faculty of Health Sciences; PO Box 19063 Tygerberg Western Cape South Africa 7505