1. South African Medical Research Council; Cochrane South Africa; Francie van Zijl Drive, Parow Valley Cape Town Western Cape South Africa 7505
2. Stellenbosch University; Centre for Evidence-based Health Care, Faculty of Medicine and Health Sciences; PO Box 241 Cape Town South Africa 8000
3. Reproductive Health Solutions; 43 Fowler's Rd Salisbury UK SP1 2QP
4. University of Cape Town, Health Sciences Faculty; Clinical Infectious Diseases Research Initiative (CIDRI); Anzio Road Observatory Cape Town Western Cape South Africa 7925