1. Queen Elizabeth II Health Sciences Centre and Dalhousie University; Halifax Nova Scotia Canada
2. Institute of Public Health and University of Cambridge, University Forvie Site; Cambridge UK
3. Toronto Western Hospital and University of Toronto; Toronto Ontario Canada
4. Instituto Nacional de Ciencias Medicas y Nutrición; Mexico City Mexico
5. University of Birmingham, College of Medical and Dental Sciences; Birmingham UK
6. Hanyang University Hospital for Rheumatic Diseases; Seoul Republic of Korea
7. McGill University Health Centre, Montreal, Quebec; Canada
8. University of Calgary; Calgary Alberta Canada
9. Cedars-Sinai Medical Center and University of California, Los Angeles; David Geffen School of Medicine; Los Angeles California
10. Oklahoma Medical Research Foundation; Oklahoma City
11. University College London; London UK
12. State University of New York Downstate Medical Center; Brooklyn
13. Johns Hopkins University; Baltimore Maryland
14. Manchester Academic Health Sciences Centre, University of Manchester, and Central Manchester University Hospitals NHS Foundation Trust; Manchester UK
15. University of North Carolina; Chapel Hill
16. Centre Hospitalier Universitaire de Québec, Université Laval; Quebec City Quebec Canada
17. Landspitali University Hospital; Reykjavik Iceland
18. Northwestern University and Feinberg School of Medicine; Chicago Illinois
19. The Rayne Institute, St. Thomas’ Hospital, and King's College London School of Medicine; London UK
20. Feinstein Institute for Medical Research; Manhasset New York
21. University of Alabama at Birmingham
22. University of Pittsburgh School of Medicine; Pittsburgh Pennsylvania
23. University Hospital Lund; Lund Sweden
24. Lanarkshire Centre for Rheumatology and Hairmyres Hospital; East Kilbride UK
25. Karolinska Institute; Stockholm Sweden
26. Institut d'Investigacions Biomèdiques August Pi i Sunyer; Hospital Clínic; Barcelona Spain
27. Hospital de Cruces and University of the Basque Country; Barakaldo Spain
28. Emory University; Atlanta Georgia
29. University of California at San Diego; La Jolla
30. Istanbul University; Istanbul Turkey
31. Medical University of South Carolina; Charleston
32. University of Manitoba; Winnipeg Manitoba Canada
33. Rigshospitalet, Copenhagen University Hospital; Copenhagen Denmark
34. New York University; New York New York