1. Health Research Institute, Faculty of Public Health, Lithuanian University of Health Sciences , Kaunas, Lithuania
2. Department of Health Management, Faculty of Public Health, Lithuanian University of Health Sciences , Kaunas, Lithuania
3. Department of Preventive Medicine, Faculty of Public Health, Lithuanian University of Health Sciences , Kaunas, Lithuania
4. Centre for Addiction and Mental Health, Institute for Mental Health Policy Research , Toronto, ON, Canada
5. Centre for Addiction and Mental Health, Campbell Family Mental Health Research Institute , Toronto, ON, Canada
6. Department of Psychiatry, University of Toronto , Toronto, ON, Canada
7. Institute of Medical Science, University of Toronto , Toronto, ON, Canada
8. Dalla Lana School of Public Health, University of Toronto , Toronto, ON, Canada
9. Program on Substance Abuse & WHO European Region Collaboration Centre, Public Health Agency of Catalonia , Barcelona, Catalonia, Spain
10. Zentrum für Interdisziplinäre Suchtforschung, Universitätsklinikum Hamburg-Eppendorf , Hamburg, Germany