Affiliation: | 1. National Advisory Unit on Rehabilitation in Rheumatology, Diakonhjemmet Hospital, Oslo, Norway;2. Institute of Health and Society, University of Oslo, and National Advisory Unit on Rehabilitation in Rheumatology, Diakonhjemmet Hospital, Oslo, Norway;3. Institute of Health and Society, University of Oslo, Norway;4. Diakonhjemmet Hospital, Oslo, Norway |