1. Department of Public Health Sciences, Centre for Social Research on Alcohol and Drugs Stockholm University Stockholm Sweden
2. Centre for Mental Health and Addiction Research IFT Institut für Therapieforschung Munich Germany
3. Institute of Psychology ELTE Eötvös Loránd University Budapest Hungary
4. Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, Faculty of Medicine and University Hospital Cologne University of Cologne Cologne Germany
5. Department of Clinical Neuroscience Karolinska Institutet Stockholm Sweden
6. The Swedish Council for Information on Alcohol and Other Drugs (CAN) Stockholm Sweden