1. Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, UK.
2. Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK.
3. Medical Research Council Unit, Atlantic Boulevard, Fajara, Post Office Box 273, The Gambia.
4. Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK.
5. Royal Victoria Teaching Hospital, Independence Drive, Post Office Box 1515, Banjul, The Gambia.
6. Centre National de Recherche et de Formation sur le Paludisme (CNRFP), 01 BP 2208 Ouagadougou 01, Burkina Faso.
7. University of Rome La Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy.
8. Department of Medical Laboratory Sciences, University of Buea, Post Office Box 63, Buea, South West Region, Cameroon.
9. Department of Biochemistry and Molecular Biology, University of Buea, Post Office Box 63, Buea, South West Region, Cameroon.
10. Kenyan Medical Research Institute (KEMRI)–Wellcome Trust Research Programme, Post Office Box 230-80108, Kilifi, Kenya.
11. Nuffield Department of Medicine, NDM Research Building, Roosevelt Drive, Headington, Oxford OX3 7FZ, UK.
12. Faculty of Medicine, Department of Medicine, Imperial College, Exhibition Road, London SW7 2AZ, UK.
13. Joint Malaria Programme, Kilimanjaro Christian Medical Centre, Post Office Box 2228, Moshi, Tanzania.
14. Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK.
15. National Institute for Medical Research, Mwanza Research Centre, Mwanza City, Tanzania.
16. Malawi-Liverpool–Wellcome Trust Clinical Research Programme, Queen Elizabeth Central Hospital, College of Medicine, Post Office Box 30096, Chichiri, Blantyre 3, Malawi.
17. Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK.
18. Blantyre Malaria Project, Queen Elizabeth Central Hospital, College of Medicine, Post Office Box 30096, Chichiri, Blantyre 3, Malawi.
19. College of Osteopathic Medicine, Michigan State University, East Lansing, MI 48824, USA.
20. International Blood Group Reference Laboratory, National Health Service (NHS) Blood and Transplant, 500 North Bristol Park, Filton, Bristol BS34 7QH, UK.