1. Faculty of Health Sciences; Department of Obstetrics and Gynecology, School of Clinical Medicine, University of the Witwatersrand, South Africa and Delta State University, Nigeria; PO Box 1718 Johannesburg South Africa 2060
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