1. Department of Medicine, University of Alberta, Edmonton
2. CARE Arthritis
3. Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, Canada
4. Medical Imaging Consultants, Edmonton, Canada
5. Rheumazentrum Ruhrgebiet Herne, Ruhr-University, Bochum, Germany
6. Department of Rheumatology, Danish Hospital for Rheumatic Diseases, University Hospital of Southern Denmark, Sønderborg
7. Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
8. Department of Rheumatology, University College London Hospitals NHS Foundation Trust
9. Department of Rheumatology, Northwick Park Hospital, London North West University Healthcare NHS Trust
10. Centre for Rheumatology and MRC Centre for Neuromuscular Diseases, University College London, London, UK
11. Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Rigshospitalet, Glostrup, Copenhagen, Denmark
12. VIB Inflammation Research Center, Ghent University
13. Rheumatology Department, Ghent University Hospital, Ghent, Belgium
14. Department of Rheumatology, Charité – Universitätsmedizin Berlin and German Rheumatism Research Centre, Berlin
15. Klinikum Bielefeld, Bielefeld
16. Department of Rheumatology, Charité – Universitätsmedizin Berlin, Berlin, Germany
17. Leiden University Medical Centre, Leiden
18. Department of Rheumatology, Academic Medical Center, University of Amsterdam, Amsterdam
19. Atrium Medical Center, Heerlen, the Netherlands
20. Sheba Medical Center, Affiliated to the Sackler School of Medicine, Tel-Aviv University, Tel Aviv, Israel
21. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark