1. CatoSenteret Rehabilitation Center, Son, Norway
2. The Mind-Body Lab, Department of Psychology, University of Oslo, Oslo, Norway
3. Norwegian National Advisory Unit on Occupational Rehabilitation, Rauland, Norway
4. Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
5. Department for Research and Innovation, Division of Mental Health and Addiction, Oslo Centre for Biostatistics and Epidemiology, Oslo, Norway