1. Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Glostrup, Denmark
2. Department of Rheumatology, Slagelse Hospital, Slagelse, Denmark
3. Department of Rheumatology, Sønderborg Sygehus, Danish Hospital for Rheumatic Diseases, Sønderborg, Denmark
4. Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
5. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
6. Musculoskeletal Statistics Unit, The Parker Institute, Frederiksberg Hospital, Frederiksberg, Denmark
7. Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
8. Department of Rheumatology, Skaraborg Hospital, Skövde, Sweden
9. Department of Radiology, Herlev Hospital, Herlev, Denmark
10. Department of Radiology, Frederiksberg Hospital, Frederiksberg, Denmark
11. Department of Rheumatology, Department of Clinical Medicine, Aarhus University Hospital, Aarhus University, Aarhus, Denmark
12. Center for Rheumatology and Spine Diseases, Copenhagen University Hospital Gentofte, Hellerup, Denmark
13. Center for Rheumatology and Spine Diseases, Frederiksberg Hospital, Frederiksberg, Denmark
14. Department of Rheumatology, Silkeborg Regional Hospital, Silkeborg, Denmark
15. Department of Rheumatology, Sygehus Vendsyssel i Hjørring, Hjørring, Denmark
16. The Parker Institute, Department of Rheumatology, Frederiksberg Hospital, Frederiksberg, Denmark
17. ZiteLab Aps, Copenhagen, Denmark
18. Department of Radiology, Silkeborg Regional Hospital, Silkeborg, Denmark
19. Department of Radiology, Aarhus University Hospital, Aarhus, Denmark