1. Queen Elizabeth II Health Sciences Center and Dalhousie University Halifax Nova Scotia Canada
2. University of Cambridge Cambridge UK
3. Toronto Western Hospital and University of Toronto Toronto Ontario Canada
4. University of Birmingham College of Medical and Dental Sciences Birmingham UK
5. Hanyang University Hospital for Rheumatic Diseases Seoul Korea
6. Instituto Nacional de Ciencias Medicas y Nutrición Mexico City Mexico
7. McGill University Montreal Quebec Canada
8. University of Calgary Cumming School of Medicine Calgary Alberta Canada
9. Cedars‐Sinai and University of California, Los Angeles School of Medicine
10. University College London London UK
11. Oklahoma Medical Research Foundation Oklahoma City
12. CHU de Québec and Université Laval Québec City Québec Canada
13. Arthritis Research UK Epidemiology UnitUniversity of ManchesterNIHR Manchester Musculoskeletal Biomedical Research Centre, and Manchester University NHS Foundation Trust Manchester UK
14. Johns Hopkins University School of Medicine Baltimore Maryland
15. SUNY Downstate Medical Center Brooklyn New York
16. University of North Carolina Chapel Hill North Carolina
17. Landspitali University Hospital Reykjavík Iceland
18. Northwestern University and Feinberg School of Medicine Chicago Illinois
19. Hairmyres Hospital East Kilbride UK
20. Allegheny Health Network Pittsburgh Pennsylvania
21. Lund University Lund Sweden
22. St. Thomas’ Hospital and King’s College London School of Medicine London UK
23. University of Alabama at Birmingham
24. Karolinska Institutet and Karolinska University Hospital Stockholm Sweden
25. Amsterdam University Medical Centers Amsterdam The Netherlands
26. Feinstein Institute for Medical Research Manhasset New York
27. Hospital Universitario Cruces and University of the Basque Country Barakaldo Spain
28. Institut d’Investigacions Biomèdiques August Pi i Sunyer and Hospital Clínic de Barcelona Barcelona Spain
29. Emory University School of Medicine Atlanta Georgia
30. Istanbul University Istanbul Turkey
31. University of California San Diego School of Medicine
32. Rigshospitalet and Copenhagen University Hospital Copenhagen Denmark
33. University of Manitoba Winnipeg Manitoba Canada
34. Medical University of South Carolina Charleston
35. NYU Langone Orthopedic Hospital New York New York