1. Biomedical Research and Training Institute Harare Zimbabwe
2. Department of Public Health, Environments and Society, Faculty of Public Health and Policy London School of Hygiene and Tropical Medicine London UK
3. Department of Global Health and Development, Faculty of Public Health and Policy London School of Hygiene and Tropical Medicine London UK
4. Clinical Research Department, Faculty of Infectious and Tropical Diseases London School of Hygiene and Tropical Medicine London UK
5. MRC London School of Hygiene and Tropical Medicine London UK
6. HIV and TB Department Ministry of Health and Child Care Harare Zimbabwe
7. Division of Infectious and Tropical Medicine Medical Centre of the University of Munich Munich Germany
8. School of Public Health University of Sydney Sydney New South Wales Australia