1. Institute of Clinical Psychology and Psychotherapy, Technische Universität Dresden Dresden Germany
2. Centre for Interdisciplinary Addiction Research University of Hamburg Hamburg Germany
3. Department of Psychiatry, Medical Faculty University of Leipzig Leipzig Germany
4. IFT Institut für Therapieforschung Munich Germany
5. Department of Public Health Sciences, Centre for Social Research on Alcohol and Drugs Stockholm University Stockholm Sweden
6. Institute of Psychology, ELTE Eötvös Loránd University Budapest Hungary
7. Alcohol, Drugs and Addictions Unit Finnish Institute for Health and Welfare Helsinki Finland
8. Institute of Psychiatry and Neurology Warsaw Poland
9. Centre for Addiction and Mental Health Institute for Mental Health Policy Research Toronto Ontario Canada
10. Dalla Lana School of Public Health University of Toronto Toronto Ontario Canada
11. WHO Collaboration Centre Centre for Addiction and Mental Health Toronto Ontario Canada
12. Faculty of Medicine, Institute of Medical Science University of Toronto Toronto Ontario Canada