1. National Reference Centre for Sexually Transmitted Diseases and Antiretroviral Therapy , Bangui , Central African Republic
2. Department of Public Health , Faculty of Health Sciences, , Bangui , Central African Republic
3. Unit for Research and Intervention in Public Health , Faculty of Health Sciences, , Bangui , Central African Republic
4. Communicable Diseases Unit, Inter-State Centre for Higher Education in Public Health of Central Africa , Brazzaville , Republic of Congo
5. Department of Infectious and Tropical Diseases, University Hospital of Friendship , Bangui , Central African Republic
6. Technical Coordination of the National AIDS Committee , Bangui , Central African Republic