1. Danish Hospital for Rheumatic Diseases, University Hospital of Southern Denmark, Sønderborg, Denmark
2. Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
3. The Danish Rheumatism Association’s Rehabilitation Centre, Sano, Denmark
4. Hospital of Southern Jutland, University Hospital of Southern Denmark, Aabenraa, Denmark
5. Section of Rheumatology, Department of Clinical Sciences, Lund University, Lund, Sweden
6. Spenshult Research and Development Centre, Halmstad, Sweden