1. Department of Clinical Sciences, Section of Rheumatology, Lund University, Lund, Sweden
2. Spenshult Research and Development Centre, Halmstad, Sweden
3. Section of Rheumatology, Department of Medicine, Helsingborgs Lasarett, Helsingborg, Sweden
4. Department of Rheumatology, Karolinska Institutet at Karolinska University Hospital, Huddinge, Sweden