1. Center of Research in Epidemiology, Biostatistics and Clinical Research, Université Libre de Bruxelles, Brussels, Belgium;
2. Department of Medical Microbiology, University of Nairobi, Nairobi, Kenya;
3. Centre de Recherche en Sciences Naturelles de Lwiro, Bukavu, DR Congo;
4. Faculty of Medicine, Université de Goma, Goma, DR Congo;
5. Department of Clinical Biology, National University of Rwanda, Kigali, Rwanda;
6. Division Provinciale de la Santé du Sud-Kivu, Bukavu, DR Congo;
7. Center of Research in Health Policy and Systems-International Health, Université Libre de Bruxelles, Brussels, Belgium
8. Laboratory of experimental hormonology, Université Libre de Bruxelles, Brussels, Belgium;