1. Aix Marseille Univ, IRD, Inserm, SESSTIM, Sciences Economiques & Sociales de la Santé & Traitement de l’Information Médicale, ISSPAM, Marseille, France
2. University of Health Sciences, Phnom Penh, Cambodia
3. HIV Unit, Infectious Diseases Department, Geneva University Hospital, Geneva, Switzerland
4. Grant Management Office, University of Health Sciences, Phnom Penh, Cambodia; French Agency for Research on AIDS, Viral Hepatitis and Emerging Infectious diseases (ANRS-MIE), Phnom Penh, Cambodia
5. National Center for HIV/AIDS, Dermatology and STD, Phnom Penh, Cambodia