1. Institute of Clinical Psychology and Psychotherapy, Technische Universität Dresden, Dresden, Germany
2. Centre for Interdisciplinary Addiction Research, University of Hamburg, 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, Toronto, Ontario, Canada
5. Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
6. Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
7. Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada