1. Walter Sisulu University, University of the Witwatersrand, Eastern Cape Department of Health; East London South Africa
2. World Health Organization; UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Reproductive Health and Research; Avenue Appia 20 Geneva Switzerland CH-1211
3. The University of Liverpool; Cochrane Pregnancy and Childbirth Group, Department of Women's and Children's Health; First Floor, Liverpool Women's NHS Foundation Trust Crown Street Liverpool UK L8 7SS
4. University of the Witwatersrand/University of Fort Hare/East London Hospital complex; Effective Care Research Unit; East London South Africa