1. Department of Anaesthesiology Oslo University Hospital Oslo Norway
2. Institute of Clinical Medicine, Faculty of Medicine University of Oslo Oslo Norway
3. Sunnaas Rehabilitation Hospital Nesodden Norway
4. Department of Psychology University of Oslo Oslo Norway
5. Norwegian Center for Violence and Traumatic Stress Studies Oslo Norway
6. Division of Mental Health and Addiction Oslo University Hospital Oslo Norway
7. Department of Behavioral Sciences in Medicine, Faculty of Medicine University of Oslo Oslo Norway