1. German University of Health and Sport, Berlin, Germany
2. Seeburg Castle University, Seekirchen am Wallersee, Austria
3. IFT Institut für Therapieforschung, Munich, Germany
4. Helmholtz Zentrum Muenchen, Institute of Health Economics and Health Care Management, 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