1. Department of Infectious and Tropical Diseases, Fann University Hospital , Dakar , Senegal
2. Department of Infectious Diseases, Bern University Hospital, University of Bern , Bern , Switzerland
3. Graduate School of Health Sciences, University of Bern , Bern , Switzerland
4. Department of Gastroenterology, Hôpital Universitaire de la Paix , Ziguinchor , Senegal
5. Department of Infectious Diseases, Hôpital Universitaire de la Paix , Ziguinchor , Senegal
6. Centre de Traitement Ambulatoire, Fann University Hospital , Dakar , Senegal
7. Department of Infectious Diseases, Centre Hospitalier du Luxembourg , Luxembourg , Luxembourg
8. Department of Infection and Immunity, Luxembourg Health Institute , Luxembourg , Luxembourg
9. ENDA (Environnement, Développement et Action) Santé , Dakar , Senegal
10. Institute of Social and Preventive Medicine, University of Bern , Bern , Switzerland