1. HIV/STI Surveillance Research Center, and WHO Collaborating Center for HIV Surveillance, Institute for Futures Studies in HealthKerman University of Medical Sciences Kerman Iran
2. Department of Biostatistics and Epidemiology, School of Public HealthMashhad University of Medical Sciences Mashhad Iran
3. School of Population and Public Health, Faculty of MedicineUniversity of British Columbia Vancouver Canada
4. British Columbia Centre on Substance Use Vancouver Canada
5. Department of Epidemiology and Biostatistics, Schulich School of Medicine and DentistryThe University of Western Ontario London Canada
6. Division of Social and Behavioural Health Sciences, Dalla Lana School of Public HealthUniversity of Toronto Toronto Canada
7. Adolescent and Youth Health OfficeMinistry of Health and Medical Education Tehran Iran