1. Bacteriology-Virology laboratory; CHU A. le Dantec; Cheikh Anta Diop University of Dakar; Dakar Senegal
2. Regional center for research and training on HIV/AIDS CHU Fann; Dakar Senegal
3. Saint Antoine Hospital; Paris France
4. Institute of Medecine and Applied Epidemiology-IMEA; Paris France
5. Psychiatry Service, CHU Fann; Dakar Senegal