1. IFT Institut für Therapieforschung, Centre for Mental Health and Addiction Research Munich Germany
2. Department of Public Health Sciences, Centre for Social Research on Alcohol and Drugs Stockholm University Stockholm Sweden
3. Centre of Interdisciplinary Addiction Research, Department of Psychiatry and Psychotherapy University Medical Center Hamburg‐Eppendorf Hamburg Germany
4. Institute of Psychology, ELTE Eötvös Loránd University Budapest Hungary
5. Department of Psychiatry and Psychotherapy, University Hospital Ludwig‐Maximilians‐University Munich Munich Germany
6. Department of Psychiatry, Medical Faculty University of Leipzig Leipzig Germany
7. Program on Substance Abuse & WHO Collaborating Centre Public Health Agency of Catalonia Barcelona Spain
8. Centre for Addiction and Mental Health Institute for Mental Health Policy Research & Campbell Family Mental Health Research Institute Toronto Canada
9. Institute of Clinical Psychology and Psychotherapy & Center for Clinical Epidemiology and Longitudinal Studies Technische Universität Dresden Germany
10. Department of Psychiatry, Institute of Medical Science, & Dalla Lana School of Public Health University of Toronto Toronto Canada