1. Iranian National Center for Addiction Studies, Tehran University of Medical Sciences; Tehran Iran
2. Department of Epidemiology, School of Public Health; Iran University of Medical Sciences; Tehran Iran
3. Mental Health Research Center, Tehran Institute of Psychiatry- Faculty of Behavioral Sciences and Mental Health, Iran University of Medical Sciences; Tehran Iran
4. Department of Psychiatry, School of Medicine; Tehran University of Medical Sciences; Tehran Iran
5. Canadian Institute for Substance Use Research; University of Victoria; Victoria Canada