1. Clinical Research Department, London School of Hygiene and Tropical Medicine, United Kingdom
2. Mwanza Intervention Trials Unit, Tanzania
3. Unit of Infections and Cancer, Institut Català d'Oncologica, IDIBELL
4. CIBER, Barcelona, Spain
5. MRC Tropical Epidemiology Group, London School of Hygiene and Tropical Medicine, United Kingdom
6. National Institute for Medical Research, Mwanza, Tanzania
7. Collaborating Centre for HIV Surveillance, School of Medicine, University of Zagreb, Croatia