1. Society and Health Research Center and School of Public Health, Facultad de Ciencias Sociales y Artes, Universidad Mayor, Chile
2. Millennium Nucleus for the Evaluation and Analysis of Drug Policies (nDP), Chile
3. Millennium Nucleus on Sociomedicine (Sociomed), Chile
4. Department of Population Health, New York University Grossman School of Medicine, NY
5. New York State Psychiatric Institute, NY
6. Center for Health Services Research, Institute for Health, Rutgers University, New Brunswick, NJ
7. Prevention Research Center, Pacific Institute for Research and Evaluation, Berkeley, CA
8. Department of Epidemiology, Columbia University, NY.