1. Department of Research and Development, Clinic of Substance Use and Addiction Medicine St. Olavs University Hospital Trondheim Norway
2. Department of Sociology and Political Science Norwegian University of Science and Technology Trondheim Norway
3. Mental Health Division, Norwegian National Advisory Unit on Concurrent Substance Abuse and Mental Health Disorders Innlandet Hospital Trust Brumunddal Norway
4. Department of Psychology University of Oslo Oslo Norway
5. Department of Education and Lifelong Learning Norwegian University of Science and Technology Trondheim Norway
6. Campus Elverum Innlandet University of Applied Sciences Elverum Norway