1. Norwegian National Advisory Unit on Concurrent Substance Abuse and Mental Health Disorders Innlandet Hospital Trust Brumunddal Norway
2. Faculty of Social and Health Sciences Inland University of Applied Sciences Hamar Norway
3. Department of Psychiatry University of Turku Turku Finland
4. Center for Life Course Health Research University of Oulu Oulu Finland
5. Norwegian Institute of Public Health Oslo Norway
6. Institute of Clinical Medicine University of Tromsø – The Arctic University of Norway Tromsø Norway
7. Section for Clinical Addiction Research Oslo University Hospital Oslo Norway
8. Department of Psychiatry University of Helsinki Helsinki Finland
9. Department of Psychiatry Hospital District of Helsinki and Uusimaa Järvenpää Finland
10. Faculty of Medicine and Health Techonology Tampere University Tampere Finland
11. Department of Psychiatry Seinäjoki Central Hospital Seinäjoki Finland
12. Medical Research Center Oulu Oulu University Hospital and University of Oulu Oulu Finland
13. Addiction Psychiatry Unit Turku University Hospital Turku Finland