1. Kenya Medical Research Institute (KEMRI) Wellcome Trust Research Programme, Kilifi, Kenya.
2. Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford, UK.
3. Department of Paediatrics, University of Oxford, Oxford, UK.
4. Wellcome Sanger Institute, Hinxton, Cambridge, UK.
5. Medical Research Council/Uganda Virus Research Institute and London School of Hygiene & Tropical Medicine Uganda Research Unit, Entebbe, Uganda.
6. London School of Hygiene and Tropical Medicine, London, UK.
7. Medical Research Council Unit The Gambia at London School of Hygiene and Tropical Medicine, Banjul, The Gambia.
8. University of North Carolina School of Medicine, CB 7435, Chapel Hill, North Carolina USA.
9. Medical Research Council: Respiratory and Meningeal Pathogens Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
10. Centre de Recherche Action en Sante (GRAS), 06 BP 10248, Ouagadougou 06, Burkina Faso.
11. Department of Clinical Biochemistry, Oxford University Hospitals, Oxford, UK.
12. Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK.
13. Centre for Clinical Vaccinology and Tropical Medicine and the Jenner Institute Laboratories, University of Oxford, Oxford, UK.
14. Department of Medicine, Imperial College, London, UK.