1. Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway
2. District General Hospital of Førde, Førde, Norway
3. Department of Health and Caring Sciences, Western Norway University of Applied Science, Førde, Norway
4. Weill Cornell Medical College, New York, NY, USA
5. Clinic of Substance Use and Addiction Medicine, St. Olavs University Hospital, Trondheim, Norway
6. Nidelv Mental Health Center, St. Olavs University Hospital, Trondheim, Norway
7. Department of Psychology, Norwegian University of Science and Technology, Trondheim, Norway