1. Division of Infectious Diseases and Global Public Health, Department of Medicine University of California, San Diego San Diego USA
2. Graduate School of Public Health San Diego State University San Diego USA
3. Department of Family Medicine and Public Health, Biostatistics Research Center University of California, San Diego San Diego USA
4. British Columbia Centre on Substance Use Vancouver Canada
5. Department of Medicine University of British Columbia Vancouver Canada
6. Faculty of Health Sciences Simon Fraser University Burnaby Canada
7. Department of Preventive Medicine Keck School of Medicine of University of Southern California Los Angeles USA
8. Centre on Drug Policy Evaluation St. Michael's Hospital Toronto Canada
9. Universidad Nacional Autónoma de México Mexico City Mexico
10. Center on Global Mental Health Research National Institute of Psychiatry Mexico City Mexico