1. Sjögren Syndrome Research Group (AGAUR), Laboratory of Autoimmune Diseases Josep Font, IDIBAPS, Department of Autoimmune Diseases, ICMiD, Hospital Clínic, Barcelona, Spain
2. Department of Rheumatology, Hôpitaux Universitaires Paris-Sud, Assistance Publique-Hopitaux de Paris, Le Kremlin Bicêtre
3. Université Paris-Sud 11, UMR 1184, Le Kremlin Bicêtre, Paris, France
4. Department of Rheumatology and Clinical Immunology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
5. Rheumatology Department, University Hospital Birmingham NHS Foundation Trust, Birmingham, UK
6. Rheumatology Department, Charité, University Hospital, Berlin, Germany
7. Department of Rheumatology, EA 4438, Strasbourg University Hospital, Université de Strasbourg, Strasbourg, France
8. Department of Rheumatology, Skane University Hospital Malmö, Lund University, Sweden
9. Rheumatology Unit, University of Pisa, Pisa
10. Clinic of Rheumatology, Department of Medical and Biological Sciences, University Hospital Santa Maria della Misericordia, Udine, Italy
11. Musculoskeletal Research Group, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
12. Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
13. Department of Pathophysiology, School of Medicine, University of Athens, Greece
14. Instituto San Giuseppe, Como and Casa di Cura di Lecco, Lecco, Italy