1. Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
2. Department of Occupational Therapy and Physiotherapy, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
3. Department of Rheumatology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
4. Department of Public Health, Institute of Population Health, Policy and Systems, University of Liverpool, Liverpool, UK
5. Ruhr-Universität Bochum, and Rheumazentrum Ruhrgebiet, Herne, Germany