1. Department of Clinical and Experimental Medicine, Rheumatology Unit, University of Pisa, Italy. chiara.baldini74@gmail.com
2. Department of Rheumatology, Hôpitaux Universitaires de Strasbourg, INSERM UMR-S 1109, Centre National de Référence des Maladies Auto-Immunes Systémiques Rares (RESO), Strasbourg, France.
3. Department of Allergology, Rheumatology and Clinical Immunology, University Children's Hospital, University Medical Centre Ljubljana, Slovenia.
4. Referral Centre for Systemic Autoimmue Diseases, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico di Milano, Milan, Italy.
5. European Federation of Sjögren's Syndrome Patient Associations (Sjögren Europe), Bienne, Switzerland, and ePAG Representative for Sjögren’s Syndrome, ERN ReCONNET.
6. Department of Rheumatology and Clinical Immunology, Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Germany.
7. Rheumatology Department, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Italy.
8. Laboratory of Experimental Rheumatology and Academic Division of Clinical Rheumatology, Department of Internal Medicine and Specialties (DIMI), University of Genova, IRCCS San Martino Polyclinic, Genova, Italy.
9. Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands.
10. Rheumatology Unit, Department of Medicine, University of Padova, Italy.
11. Department of Clinical and Experimental Medicine, Rheumatology Unit, University of Pisa, Italy.
12. Rheumatology Department, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, Lisbon Academic Medical Centre, Lisbon, and Rheumatology Research Unit, Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal.
13. Federation of European Scleroderma Associations (FESCA), Milan, Italy.
14. Strasbourg University Hospital, National Reference for Systemic Rare Auto-Immune Diseases, Department of Rheumatology, IBMC, CNRS UPR 3572, Strasbourg, France.
15. Service de Médecine Interne et Immunologie Clinique, Centre de Référence des Maladies Autoimmunes Systémiques Rares du Nord et Nord-Ouest de France (CeRAINO), University of Lille, Inserm, CHU Lille, U1286 - INFINITE - Institute for Translational Research in Inflammation, Lille, France.
16. Translational Matrix Biology and Department for Dermatology, Medical Faculty, Cologne, Germany.
17. Clinical Immunology Deparment, Strasbourg University Hospital, National Reference Center for Systemic Autoimune Diseases (ESO), France.
18. Department of Experimental and Clinical Medicine, University of Florence, and Department of Geriatric Medicine, Division of Rheumatology, AOUC, Florence, and Unit of Immunology, Rheumatology, Allergy and Rare diseases (UnIRAR), IRCCS San Raffaele Hospital, Milan, Italy.
19. Department of Dermatology and Venereology, University of Cologne, Germany.
20. Assistance Publique-Hôpitaux de Paris, Hôpital Cochin, Paris, France.
21. Department of Rheumatology and Clinical Immunology, Justus-Liebig University Giessen, Kerckhoff Clinic Bad Nauheim, Bad Nauheim, Germany.
22. Department of Rheumatology, Emergency County Teaching Hospital, University of Medicine and Pharmacy, Cluj-Napoca, Romania.
23. Department of Internal Medicine, Ghent University; Department of Rheumatology, Ghent University Hospital, and Unit for Molecular Immunology and Inflammation, VIB Inflammation Research Centre (IRC), Ghent, Belgium.
24. Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, The Netherlands.
25. Liga Portuguesa Contra as Doenças Reumáticas, Núcleo Síndrome de Sjögren, Lisbon, Portugal, and ePAG Representative for Sjögren’s Syndrome, ERN-ReCONNET.
26. Université Paris-Saclay, Hôpital Bicêtre, Assistance Publique-Hôpitaux de Paris, INSERM UMR1184, Reference Centre for Rare Systemic Autoimmube Diseases, Le Kremlin Bicêtre, France.