1. Department of Social Studies, Faculty of Social Sciences University of Stavanger Stavanger Norway
2. Department of Psychiatry District General Hospital of Førde Førde Norway
3. Department of Psychiatry, Perelman School of Medicine University of Pennsylvania Philadelphia USA
4. Philadelphia VA Medical Center Philadelphia USA
5. Centre for Alcohol and Drug Research Stavanger University Hospital Stavanger Norway
6. Department of Public Health, Faculty of Health University of Stavanger Stavanger Norway
7. TIPS—Network for Clinical Research in Psychosis Stavanger University Hospital Stavanger Norway