1. Institute of Clinical Psychology and Psychotherapy, Technische Universität Dresden, Dresden, Germany
2. Center for Interdisciplinary Addiction Research (ZIS), Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
3. Department of Psychiatry, Medical Faculty, University of Leipzig, Leipzig, Germany
4. Institute for Mental Health Policy Research, Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada
5. Institute of Health Policy, Management and Evaluation, Toronto, Ontario, Canada
6. Department of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
7. Campbell Family Mental Health Research Institute, CAMH, Toronto, Ontario, Canada
8. WHO Collaborating Centre for Addiction and Mental Health, Centre for Addiction and Mental Health, Toronto, ON, Canada