1. DANBIO and Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Centre of Head and Orthopedics, Rigshospitalet, Denmark
2. Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
3. Department of Rheumatology, Center for Rheumatology and Spine Diseases, Gentofte and Herlev Hospital, Copenhagen, Denmark
4. Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Centre of Head and Orthopedics, Rigshospitalet, Copenhagen, Denmark
5. Danish Hospital for Rheumatic Diseases, University Hospital of Southern Denmark, Sønderborg, Denmark
6. Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
7. Department of Rheumatology, Zealand University Hospital, Køge, Denmark
8. Department of Rheumatology, Center for Rheumatology and Spine Diseases, Centre of Head and Orthopedics, Rigshospitalet, Glostrup, Denmark
9. Department of Rheumatology, Odense University Hospital, Odense, Denmark
10. Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
11. Department of Clinical Medicine, Health, Aarhus University, Aarhus, Denmark
12. Department of Clinical Research, University of Southern Denmark, Odense, Denmark
13. Rheumatology Section, Department of Medicine M, Odense University Hospital and Svendborg Hospital, Svendborg, Denmark
14. Diagnostic Center, Silkeborg Regional Hospital, Silkeborg, Denmark
15. Department of Medicine, Horsens Regional Hospital, Horsens, Denmark
16. Zitelab, Copenhagen, Denmark
17. Gigtforeningen/Danish Rheumatism Association, Denmark