1. Johns Hopkins University Baltimore Maryland
2. Sorbonne Université INSERM Institut Pierre Louis d'Epidémiologie et de Santé Publique and Pitié Salpêtrière Hospital AP‐HP Paris France
3. University of Oxford Oxford UK
4. Rheumazentrum Ruhrgebiet, Herne and Ruhr‐University Bochum Germany
5. Singapore General Hospital Duke‐NUS Medical School Singapore
6. Hospital de Clinicas de Porto Alegre Porto Alegre Brazil
7. Hospital Clínic and IDIBAPS Barcelona Spain
8. Sapienza Università di Roma Rome Italy
9. Sf Maria Hospital University of Medicine and Pharmacy Carol Davila Bucharest Romania
10. Le Mans Central Hospital Le Mans France
11. East‐Tallinn Central Hospital Tallinn Estonia
12. Toulouse University Hospital UMR 1027 INSERM Université Paul Sabatier Toulouse III Toulouse France
13. Gabriel Montpied Hospital Clermont Ferrand France
14. University of Ottawa the Ottawa Hospital Research Institute Ottawa Canada
15. Women’s College Hospital University of Toronto Toronto Ontario Canada
16. North‐western State Medical University St. Petersburg Russia
17. University of Molise Campobasso Italy
18. Hacettepe University Ankara Turkey
19. Hopital Lariboisiere Centre Viggo Petersen service de Rhumatologie and Universite Paris Diderot UFR de Medecine INSERM UMR1132 Bioscar Paris France
20. Cleveland Clinic Cleveland Ohio
21. Medical University of Vienna Vienna Austria
22. Amsterdam University Medical Centre Amsterdam Netherlands