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