1. School of Health and Welfare, Halmstad University, Halmstad, Sweden
2. Department of Rheumatology, Skåne University Hospital, Lund, Sweden
3. Section of Rheumatology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
4. Spenshult Research and Development Centre, Halmstad, Sweden
5. Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
6. Danish Hospital for Rheumatic Diseases, University Hospital of Southern Denmark, Sonderborg, Denmark