1. Department of Clinical Services, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway;
2. Diakonhjemmet Hospital, National Advisory Unit on Rehabilitation in Rheumatology, Oslo, Norway;
3. Department of Occupational Therapy, Prosthetics and Orthotics, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, Oslo, Norway