1. MRC Clinical Trials Unit, London
2. Queen Mary University of London, United Kingdom
3. Joint Clinical Research Centre, Kampala
4. MRC/UVRI Uganda Research Unit on AIDS, Entebbe
5. University of Zimbabwe Clinical Research Centre, Harare
6. Baylor-Uganda Pediatric Infectious Disease Centre, Mulago
7. Infectious Disease Institute, Makarere University, Kampala, Uganda
8. Imperial College, London, United Kingdom
9. University of Zimbabwe Medical School, Harare