1. Department of Medical Microbiology, University of Nairobi, Nairobi, Kenya;
2. Center of Research in Epidemiology, Biostatistics and Clinical Research, Université Libre de Bruxelles, Brussels, Belgium;
3. Centre de Recherche en Sciences Naturelles de Lwiro, Bukavu, DR Congo;
4. Center of Research in Health Policy and Systems-International Health, Université Libre de Bruxelles, Brussels, Belgium
5. London School of Hygiene and Tropical Medicine, London, United Kingdom;
6. Medical Research Council Unit The Gambia, Fajara, The Gambia;
7. Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium;
8. Department of Infectious Diseases, Centre Hospitalier Universitaire Saint-Pierre, Brussels, Belgium;