1University of Leeds, Leeds, UK
2Merrill-Palmer Skillman Institute and Department of Psychiatry & Behavioral Neurosciences, Wayne State University, Detroit, MI UK
3Interdisciplinary Research Unit, Elective Surgery Center, Regional Hospital Silkeborg, Silkeborg, Denmark
4Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
5Explorable AS, Kristiansand, Norway
6Trimbos Institute The Netherlands Institute of Mental Health and Addiction, Utrecht, The Netherlands
7Arkin Mental Health Care, Amsterdam, The Netherlands
8Department of Psychiatry, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
9The Norwegian Centre for Addiction Research, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
10Blue Cross Addiction Clinic, Oslo, Norway
11Research Department of Primary Care and Population Health, University College London, London, UK
12Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet, Stockholm, Sweden
13Stockholm Center for Dependency Disorders, Stockholm, Sweden