1. University of Florence Florence Italy
2. San Raffaele Hospital, IRCCS, Vita‐Salute San Raffaele University Milan Italy
3. Hospices Civils de Lyon and University of Lyon Lyon France
4. ASST Spedali Civili of Brescia and University of Brescia Brescia Italy
5. University of Cagliari Cagliari Italy
6. Azienda Ospedaliera‐Universitaria di Padova Padova Italy
7. Cantonal Hospital St. Gallen, St. Gallen, Switzerland, and Jena University Hospital Jena Germany
8. Polyclinic Hospital, University of Bari Bari Italy
9. Tareev Clinic of Internal Diseases, Sechenov First Moscow State Medical University Moscow Russia
10. University of Pisa Pisa Italy
11. Fondazione Poliambulanza Istituto Ospedaliero Brescia Italy
12. Santa Chiara Hospital and University of Trento Trento Italy
13. University of Brescia and Spedali Civili Hospital, ASST Spedali Civili di Brescia Brescia Italy
14. Humanitas Clinical and Research Center, IRCCS and Humanitas University, IRCCS Milan Italy
15. IRCCS Ospedale Policlinico San Martino and University of Genoa Genoa Italy
16. University of Milano Bicocca Monza Italy
17. University of Udine, Azienda sanitaria universitaria Friuli Centrale Udine Udine Italy
18. University of Verona Italy
19. Rheumazentrum Schleswig‐Holstein Mitte Neumünster Germany
20. Hospital Clínic, University of Barcelona and Institut d'investigacions Biomèdiques August Pi I Sunyer (IDIBAPS) Barcelona Spain
21. ASST Grande Ospedale Metropolitano Niguarda Milan Italy
22. Heinrich Heine University Düsseldorf Düsseldorf Germany
23. Policlinico S. Matteo Fondazione, IRCCS, University of Pavia Pavia Italy
24. University of Ferrara Ferrara Italy
25. Policlinico‐Vittorio Emanuele San Marco University Hospital Catania Italy
26. University of Padova Padova Italy
27. University Hospital Ospedali Riuniti Ancona Italy
28. San Giovanni Bosco Hospital and University of Turin Turin Italy
29. Aldo Moro University of Bari Bari Italy
30. Lund University, Skåne University Hospital, Lund, Sweden, and University of Cambridge Cambridge UK
31. Medius Kliniken, University of Tübingen, Kirchheim unter Teck Germany
32. Dijon University Hospital Dijon France
33. University of Siena Siena Italy
34. University of Alberta, Edmonton, Alberta, Canada, and Maastricht University Maastricht The Netherlands
35. University Hospital Center of Lausanne Lausanne Switzerland
36. Azienda USL‐IRCCS di Reggio Emilia, IRCCS, and Università di Modena e Reggio Emilia Reggio Emilia Italy
37. ASST Spedali Civili of Brescia Brescia Italy
38. University of Cambridge Cambridge UK
39. Hannover Medical School Hannover Germany
40. University of Florence and Meyer Children's Hospital Florence Italy