1. St. Olav’s University Hospital, Trondheim, Norway
2. Norwegian National Advisory Unit on Concurrent Substance Abuse and Mental Health Disorders, Innlandet Hospital Trust, Brumunddal, Norway
3. University of Oslo, Blindern, Oslo, Norway
4. Norwegian National Advisory Unit on Concurrent Substance Abuse and Mental Health Disorders, Mental Health Division, Innlandet Hospital Trust, Brumunddal, Norway