1. Auckland District Health Board; Auckland New Zealand
2. University of Otago; Wellington New Zealand
3. University of Sheffield; Sheffield UK
4. Schlosspark-Klinik, Charité, University Medicine Berlin; Berlin Germany
5. Hospital General de México; Mexico City Mexico
6. Christchurch Hospital; Christchurch New Zealand
7. Università di Genova; Genova Italy
8. Pedro Ernesto University Hospital; Rio de Janeiro Brazil
9. University of New South Wales and St Vincent's Hospital; Sydney Australia
10. University of Massachusetts Medical School; Worcester, and Corrona LLC Southborough
11. Leeds Institute of Rheumatic and Musculoskeletal Medicine; Leeds UK
12. Rijnstate Hospital; Arnhem The Netherlands
13. Veterans Affairs Medical Center, Georgetown and Howard University Hospitals; Washington DC
14. University of California School of Medicine; San Diego
15. University of Michigan; Ann Arbor
16. University of Michigan and Ann Arbor VA Medical Center; Ann Arbor
17. Taichung Veteran's General Hospital; Taichung Taiwan
18. Faculty of Medicine, Chiang Mai University; Chiang Mai Thailand
19. Mater Misericordiae University Hospital and University College; Dublin Ireland
20. Nebraska-Western Iowa Health Care System and University of Nebraska Medical Center; Omaha
21. Boston University School of Medicine; Boston Massachusetts
22. University of Pennsylvania; Philadelphia
23. Hospital Universitario Cruces, OSI-EEC, and Biocruces Health Research Institute; Biscay Spain
24. Rutgers University Robert Wood Johnson Medical School; New Brunswick New Jersey
25. IRCCS Policlinico San Matteo Foundation, University of Pavia; Pavia Italy
26. University of Alabama at Birmingham and the Birmingham VA Medical Center; Birmingham
27. Hospital General Universitario Elda; Elda Spain
28. Copenhagen University Hospital Glostrup; Glostrup Denmark
29. University of Otago; Christchurch New Zealand
30. University Hospital Carl Gustav Carus; Dresden Germany
31. University of California San Diego VA Medical Center; La Jolla
32. National Advisory Unit on Rehabilitation in Rheumatology, Diakonhjemmet Hospital; Oslo Norway
33. Universiteit Twente; Erschede The Netherlands
34. Waikato DHB and Waikato Clinical School, University of Auckland; Hamilton New Zealand
35. Tokyo Women's Medical University; Tokyo Japan
36. Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, and Peking Union Medical College; Beijing China
37. University of Auckland and Auckland District Health Board; Auckland New Zealand