1. Department of Rheumatology, University Hospital Basel, Basel
2. Department of Rheumatology, University Hospital Zurich, Zurich, Switzerland
3. Department of Rheumatology and Immunology, Medical Center, University of Pécs, Pécs, Hungary
4. Department of Rheumatology, Second University of Naples, Naples, Italy
5. NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust and Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds
6. Department of Rheumatology, University College London, Royal Free Hospital, London, UK
7. Department of Rheumatology, University of Paris Descartes, Paris, France
8. Department of Rheumatology, University Clinic Schleswig-Holstein, Lübeck
9. Department of Rheumatology and Clinical Immunology, University Hospital Charité
10. German Rheumatism Research Centre, Berlin, Germany
11. Department of Rheumatology, University of Florence, Florence, Italy
12. Department of Rheumatology and Clinical Immunology, Justus-Liebig University Giessen, Kerckhoff Clinic Bad Nauheim, Bad Nauheim, Germany
13. Federation of European Scleroderma Associations Aisbl, Budapest, Hungary
14. new-win SW Solutions AG, Suhr, Switzerland
15. VA Nasonova Institute of Rheumatology, Moscow, Russian Federation
16. Department of Internal Medicine and Rheumatology, Dr Ion Cantacuzino Clinical Hospital, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
17. Rheumatology Unit, Department of Medicine, University of Padova, Padova, Italy
18. Department of Rheumatology, University of Marmara, Altunizade-Istanbul, Turkey
19. Department of Dermatology, University of Cologne, Cologne, Germany
20. Clinica Reumatologie, University of Medicine & Pharmacy, Cluj-Napoca, Romania
21. II Chair of Rheumatology, University of Cagliari-Policlinico Universitario, Monserrato, Italy
22. Department of Rheumatology and Immunology, Krankenhaus St Josef, Wuppertal, Germany
23. Divisione di Reumatologia, Università di Roma La Sapienza, Roma, Italy
24. Servicio de Reumatología, Hospital Universitario Madrid Norte Sanchinarro, Madrid, Spain
25. Istituto di Clinica Medica Generale, Ematologia ed Immunologia Clinica, Università Politecnica delle Marche, Ancona, Italy
26. Endokrinologikum Frankfurt, Frankfurt, Germany
27. Division of Rheumatology, University Hospital of Split, Split, Croatia
28. Rheumatology 2 Department, Clinical Rehabilitation Hospital, University of Medicine and Pharmacy ‘Grigore T. Popa’, Iasi, Romania
29. Faculty of Internal Medicine, Ghent University, Ghent, Belgium