1. University of Auckland; Auckland New Zealand
2. University of Pennsylvania; Philadelphia
3. Radboud University Medical Centre; Nijmegen The Netherlands
4. Boston University School of Medicine; Boston Massachusetts
5. Viecuri Medical Center; Venlo The Netherlands
6. University of Otago; Wellington New Zealand
7. Chiang Mai University; Chiang Mai Thailand
8. Hospital General de Mexico; Mexico City Mexico
9. Nasonova Research Institute of Rheumatology of Russia; Moscow Russia
10. Geraldine McCarthy, MD, FRCPI, University College Dublin School of Medicine and Medical Science; Dublin Ireland
11. University of Otago; Christchurch New Zealand
12. Hospital Universitario Cruces & BioCruces Health Research Institute; Vizcaya Spain
13. Hospital General Universitario de Elda; Alicante Spain
14. Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, INSERM, UMR 1132, Hôpital Lariboisière, Assistance Publique-Hôpitaux de Paris, and Hôpital Lariboisière; Paris France
15. Westfries Gasthuis; Hoorn The Netherlands
16. Carlo A. Scire, MD, PhD, Italian Society for Rheumatology; Milan Italy
17. University and IRCCS Policlinico S. Matteo Foundation; Pavia Italy
18. Taichung Veterans General Hospital; Taichung Taiwan
19. University Hospital Carl Gustav Carus; Dresden Germany
20. Universidade de Estado do Rio de Janeiro; Rio de Janeiro Brazil
21. Rijnstate Hospital; Arnhem The Netherlands
22. China Medical University School of Medicine; Taichung Taiwan
23. University of Genoa; Genoa Italy
24. Diakonhjemmet Hospital; Oslo Norway