1. Department of Addiction, Division of Mental Health and Addiction, University Hospital of Northern Norway, Åsgårdvegen 40, 9016 Tromsø, Norway
2. Department of Internal Medicine, Finnmark Hospital Trust, Sykehusveien 35, 9601 Hammerfest, Norway
3. Department of Mental Health, St Olav University Hospital, Postboks 3250 Torgarden, 7006 Trondheim, Norway
4. Department of Mental Health, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Høgskoleringen 1, 7491 Trondheim, Norway
5. Department of Acute Psychiatry, St. Olav University Hospital, St. Olavs hospital HF, avd Østmarka, Postboks 3250 Torgarden, 7006 Trondheim, Norway