1. Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK.
2. KU Leuven - University of Leuven, Department of Microbiology and Immunology, Rega Institute for Medical Research, Clinical and Epidemiological Virology, Minderbroedersstraat 10, B-3000 Leuven, Belgium.
3. Institute of Evolutionary Biology, University of Edinburgh, Ashworth Laboratories, Kings Buildings, West Mains Road, Edinburgh EH9 3JT, UK.
4. Fogarty International Center, National Institutes of Health, Bethesda, MD 20892, USA.
5. Centre for Immunity, Infection and Evolution, University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh EH9 3JT, UK.
6. Departments of Biomathematics and Human Genetics, David Geffen School of Medicine at UCLA, University of California, Los Angeles, CA 90095-1766, USA.
7. Department of Biostatistics, UCLA Fielding School of Public Health, University of California, Los Angeles, CA 90095-1766, USA.
8. Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.
9. Department of Geography and Environment, University of Southampton, Highfield, Southampton, UK.
10. Centro de Malária e outras Doenças Tropicais and Unidade de Microbiologia, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Rua da Junqueira 100, 1349-008 Lisbon, Portugal.
11. Department of Microbiology and Infectious Diseases, Université de Sherbrooke, CHUS, 3001, 12ème Avenue Nord, Sherbrooke, QC J1H 5N4, Canada.
12. Department of Biochemistry, Genetics and Immunology, University of Vigo, Vigo 36310, Spain.
13. Laboratoire Retrovirus, UMI233, Institut de Recherche pour le Développement and University of Montpellier, 911 Avenue Agropolis, BP5045, 34032 Montpellier, France.