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. Institute for Mental Health Policy Research, Centre for Addiction and Mental Health , Toronto, Canada
4. Department of Preventive Medicine, Faculty of Public Health, Lithuanian University of Health Sciences , Kaunas, Lithuania
5. Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health , Toronto, Canada
6. Department of Psychiatry, University of Toronto , Toronto, Canada
7. Faculty of Medicine, Institute of Medical Science, University of Toronto , Toronto, Canada
8. Dalla Lana School of Public Health, University of Toronto , Toronto, Canada
9. Institute of Clinical Psychology and Psychotherapy & Center of Clinical Epidemiology and Longitudinal Studies (CELOS), Technische Universität Dresden , Dresden, Germany
10. Center for Interdisciplinary Addiction Research (ZIS), Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf (UKE) , Hamburg, Germany
11. Program on Substance Abuse, Public Health Agency of Catalonia, Program on Substance Abuse & designated WHO CC, Public Health Agency of Catalonia , Barcelona, Spain