1. Division of Rheumatology, AOU Careggi, University of Florence, 50121 Florence, Italy
2. Department of Rheumatology, University Hospital Zurich, University of Zurich, 8006 Zurich, Switzerland
3. Division of Internal Medicine, AOU Careggi, University of Florence, 50121 Florence, Italy
4. Interventional Pulmonology Unit, AOU Careggi, University of Florence, 50121 Florence, Italy
5. Department of Rheumatology, Sheffield Teaching Hospitals NHS Foundation Trust, Royal Hallamshire Hospital, Sheffield S10 2JF, UK
6. Raynaud’s and Scleroderma Programme, NIHR Biomedical Research Centre and Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds LS2 9JT, UK
7. Rheumatology Unit, Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, 81100 Naples, Italy
8. Rheumatology Unit, “Sapienza” University, 00185 Rome, Italy
9. Rheumatology Department, Hopital Cochin, University of Paris, 75019 Paris, France
10. Internal Medicine & Rheumatology Department, Cantacuzino Hospital, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
11. Rheumatology, Charite University Hospital, 10117 Berlin, Germany
12. Department of Rheumatology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
13. Service de Médecine Interne, Centre Hospitalier Universitaire, 59000 Lille, France
14. Department of Internal Medicine, Division of Rheumatology, Chris Hani Baragwanath Academic Hospital, University of the Witwatersrand, Johannesburg 1864, South Africa
15. Institute of Rheumatology, University Belgrade Medical School, 11000 Belgrade, Serbia
16. Service Immunologie et Allergie, CHUV, 1005 Lausanne, Switzerland
17. National Referral Center for Rare Systemic Autoimmune Diseases, Hôpital Cochin, University Paris Descartes, 75006 Paris, France
18. Department of Rheumatology, Oslo University Hospital, 0372 Oslo, Norway
19. Department of Clinical and Molecular Science, Università Politecninca delle Marche, 60121 Ancona, Italy
20. Unit of Immunology, Rheumatology, Allergy and Rare Diseases (UnIRAR), IRCCS San Raffaele Hospital, 20132 Milan, Italy
21. Division of Rheumatology, University California Los Angeles, Los Angeles, CA 90095, USA