[1] Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim
[2] Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim
[3] Norwegian Advisory Unit on Complex Symptom Disorders, St. Olavs Hospital, Trondheim, University Hospital, Trondheim
[4] The Norwegian Labour and Welfare Service of TrØndelag, Trondheim
[5] Forensic Department and Research Centre BrØset, St. Olavs Hospital, Trondheim University Hospital, Trondheim
[6] The Norwegian Directorate for Labour and Welfare, Oslo
[7] Centre for Health Care Improvement, St. Olavs Hospital, Trondheim University Hospital, Trondheim
[8] Department of Psychology, Faculty of Social and Educational Sciences, Norwegian University of Science and Technology (NTNU), Trondheim