1. Toronto Scleroderma Program, Division of Rheumatology, Department of Medicine, Toronto Western Hospital, Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
2. Toronto Scleroderma Program, Division of Rheumatology, Department of Medicine, Toronto Western Hospital, University of Toronto, Toronto, ON, Canada
3. The Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
4. Division of Rheumatology, University of Michigan Scleroderma Program, Ann Arbor, MI, USA
5. Division of Rheumatology, Department of Medicine, Jewish General Hospital, McGill University, Montreal, QC, Canada;
6. Department of Rheumatology AVC, Department of BioMedicine, Division of Rheumatology AOUC, Department of Medicine and Denothe Centre, University of Florence, Florence, Italy
7. Centre for Rheumatology and Connective Tissue Diseases, Royal Free Hospital, London, UK
8. Department of Medicine, Division of Rheumatology and Clinical Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
9. Department of Rheumatology, University Hospital 12 de Octubre, Madrid, Spain
10. Department of Rheumatology, University of Lübeck, Lung Research Center Borstel, a Leibniz institute, Lübeck, Germany
11. Department of Internal Medicine 3 and Institute for Clinical Immunology, University of Erlangen-Nuremberg, Erlangen, Germany
12. Department of Molecular and Clinical Sciences, Clinical Medicine, University of Marche, Ancona, Italy
13. Department of Medicine, Division of Rheumatology, Clinical Immunology and Allergy, Georgetown University School of Medicine, Washington, DC, USA
14. Department of Medicine and Dermatology, Division of Immunology and Rheumatology, Stanford University, Stanford, CA, USA
15. Department of Medicine, Division of Rheumatology and Immunology, Medical University of South Carolina, Charleston, SC, USA
16. Department of Medicine, Division of Rheumatology, Clinical Immunology and Allergy, Northwestern University, Chicago, IL, USA
17. Department of Rheumatology and Clinical Immunology, Justus-Liebig University Giessen, Kerckhoff Clinic, Bad Nauheim, Germany
18. Department of Rheumatic Diseases, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
19. Department of Rheumatology, University of Basel, Basel, Switzerland
20. Department of Rheumatology, Lund University Hospital, Lund, Sweden
21. Centre for Musculoskeletal Research, Institute of Inflammation and Repair, The University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
22. Division of Rheumatology, University of California Los Angeles (UCLA), Los Angeles, CA, USA
23. Department of Rheumatology and Immunology, University of Pécs, Clinical Center, Pécs, Hungary
24. Department of Rheumatology and Internal Medicine, Medical University of Bialystok, Białystok, Poland
25. Scleroderma Programme, Leeds Institute of Rheumatic and Musculoskeletal Medicine, LMBRU, University of Leeds, Leeds, UK
26. Research Laboratory and Academic Division of Clinical Rheumatology, University of Genova, IRCCS AOU S Martino, Genova, Italy
27. Department of Dermatology, University of Cologne, Cologne, Germany
28. Inflammatory Bowel Disease Unit, Royal Free London NHS Foundation Trust, London, UK
29. Hamburg Center for Paediatric Rheumatology, Eilbek Clinic, Hamburg, Germany
30. Department of Internal Medicine, Paris Descartes University, the Public Hospitals of Paris, Paris, France
31. Institute of Rheumatology, University of Belgrade School of Medicine, Belgrade, Serbia
32. Division of Rheumatology, Department of Internal Medicine, University of Toledo Medical Center, Toledo, OH, USA
33. Division of Rheumatology, Department of Internal Medicine, School of Medicine, University of Utah, Salt Lake City, UT, USA
34. University of Texas Health Science Center at Houston, Houston, TX, USA
35. New Orleans Scleroderma and Sarcoidosis Patient Care and Research Center, Tulane University Lung Center, New Orleans, LA, USA
36. Division of Rheumatology, Department of Medicine, St Joseph Health Care, University of Western Ontario, London, ON, Canada