1. Effective Care Research Unit, East London Hospital Complex/University of the Witwatersrand/University of Fort Hare, East London, South Africa
2. Tembisa Hospital and University of the Witwatersrand, South Africa
3. University of the Western Cape, South Africa
4. UNDP/UNFPA/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Reproductive Health and Research (RHR), World Health Organization, Geneva, Switzerland