V. Reissner 1, B. Baune 2, V. Votsidi 3, F. Schifano 4, R. Room 5, R. Stohler 6, C. Schwarzer 7, N. Scherbaum 1
1 Department of Addiction Medicine. University and Medical School Essen, Essen, Germany
2 Department of Psychiatry, School of Medicine James Cook University, Townsville, Australia
3 Department of Psychiatry, University Mental Health Research Institute (UMHRI), Athens, Greece
4 Servizio Per Le Tossicodipendenze 1, Padova, Italy
5 Department of Addictive Behaviour & Psychological Medicine, St. Georges Hospital Medical School, London, UK
6 Centre for Social Research on Alcohol and Drugs. Stockholm University, Stockholm, Sweden
7 Department of Psychiatry. University of Zurich (PUK), Zurich, Switzerland
8 Department of Educational Sciences. University of Dusseldorf, Dusseldorf, Germany