1. Centre for Research and Training on Substance Abuse–HIV, Hanoi Medical University, Hanoi, Vietnam
2. Doctoral School of Law and Political Sciences, Montpellier University, Montpellier, France
3. Centre of Medicine, Sciences, Health, Mental Health and Health Policy (CERMES 3) (Inserm U988/CNRS UMR 8211/EHESS/Université Paris Descartes), Paris, France