1. Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway
2. Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
3. Department of Forensic Medicine, Oslo University Hospital, Oslo, Norway
4. Center for psychopharmacology, Diakonhjemmet Hospital, Oslo, Norway
5. Norwegian Center for Addiction Research, University of Oslo, Oslo, Norway
6. Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
7. Infectious Disease Department, Akershus University Hospital, Akerhus, Norway
8. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
9. NORMENT Centre of Excellence, Haukeland University Hospital, Bergen, Norway
10. Faculty of Psychology, Department of Clinical Psychology, University of Bergen, Bergen, Norway
11. Institute of Clinical Medicine, UiT – Norway’s Arctic University, Tromsø, Norway;
12. Department of Alcohol, Tobacco and Drugs, Norwegian Institute of Public Health, Oslo, Norway