1. Organization for Public Health Interventions and Development (OPHID), 20 Cork Road, Belgravia, Harare, Zimbabwe
2. London School of Hygiene and Tropical Medicine (LSHTM), Keppel Street, London, WC1E 7HT, UK
3. Centre for Sexual Health and HIV/AIDS Research (CeSHHAR), 4 Bath Rd, Belgravia, Harare, Zimbabwe
4. Department of International Public Health, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA UK
5. Zvitambo Institute for Maternal and Child Health Research, 16 Lauchlan Avenue, Meyrick Park, Mabelreign, Harare, Zimbabwe
6. University College London, London, UK
7. Biomedical Research and Training Institute (BRTI), 10 Seagrave Road, Avondale, Harare
8. University of Sydney, School of Public Health, University of Sydney, Camperdown, 2006, Australia