Influence of geolocation and ethnicity on the phenotypic expression of primary Sjögren's syndrome at diagnosis in 8310 patients: a cross-sectional study from the Big Data Sjögren Project Consortium.

Address: Autoimmune Diseases Unit, Department of Medicine, Hospital CIMA- Sanitas, Barcelona, Spain.; Sjögren Syndrome Research Group (AGAUR), Laboratory of Autoimmune Diseases Josep Font, IDIBAPS-CELLEX, Department of Autoimmune Diseases, ICMiD, University of Barcelona, Hospital Clínic, Barcelona, Spain.; Department of Statistics, Faculty of Science and Letters, Mimar Sinan Fine Arts University, Istanbul, Turkey.; Division of Clinical Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.; Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.; Center for Immunology of Viral Infections and Autoimmune Diseases, Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Paris-Sud, Le Kremlin-Bicêtre, Université Paris Sud, INSERM U1184, Paris, France.; Department of Rheumatology, Malmö University Hospital, Lund University, Lund, Sweden.; Department of Rheumatology and Immunology, Anhui Provincial Hospital, Hefei, China.; Rheumatology Unit, University of Pisa, Pisa, Italy.; Department of Rheumatology, Strasbourg University Hospital, Université de Strasbourg, CNRS, Strasbourg, France.; Department of Clinical Immunology & Rheumatology, Christian Medical College & Hospital, Vellore, India.; Clinic of Rheumatology, Department of Medical and Biological Sciences, University Hospital "Santa Maria della Misericordia", Udine, Italy.; Department of Internal Medicine and Medical Specialties, Rheumatology Clinic, Sapienza University of Rome, Rome, Italy.; Immunology and Rheumatology Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán. México City, Mexico.; Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands.; Department of Medicine, Federal University of Espírito Santo, Vitória, Brazil.; Department of Medicine, Solna, Unit of Experimental Rheumatology, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden.; Département de Médecine Interne, Hôpital Lariboisière, Université Paris VII, Assistance Publique-Hôpitaux de Paris, Paris, France.; Rheumatology Unit, Department of Medicine, University of Perugia, Perugia, Italy.; Department of Rheumatology, University Medical Centre, Ljubljana, Slovenia.; Division of Medicine, Centre for Rheumatology, University College London, London, UK.; Department of Internal Medicine, Hospital Vall d'Hebron, Barcelona, Spain.; Department of Rheumatology, The Queen Elizabeth Hospital, Discipline of Medicine University of Adelaide, South Australia.; Division of Rheumatology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea.; Rheumatology, Department of Medical Sciences, Uppsala University, Uppsala, Sweden.; Division of Rheumatology, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan.; Clinical Unit of Rheumatology, School of Medicine, University of l'Aquila, L'Aquila, Italy.; Rheumatology Department, Brest University Hospital, Brest, France.; Centre for Experimental Medicine and Rheumatology, Queen Mary University of London, London, UK.; Otorhinolaryngology / Head and Neck Surgery, Technical University Munich, Munich, Germany.; Department of Rheumatology & Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.; Department of Clinical Science, University of Bergen; and Department of Rheumatology, Haukeland University Hospital, Bergen, Norway.; Department of Internal Medicine, Hospital Ramón y Cajal, Madrid, Spain.; Division of Rheumatology, Allergy and Immunology Winthrop-University Hospital, Stony Brook University School of Medicine, Mineola, New York, USA.; Rheumatology Department, Kasr Al Ainy School of Medicine, Cairo University, Cairo, Egypt.; Department of Rheumatology, Teaching hospital and University of Montpellier, Montpellier, France.; German Hospital, Buenos Aires, Argentina.; IRCCS Galeazzi Orthopedic Institute, Milan, Italy.; Hospital Privado Universitario de Córdoba, Institute University of Biomedical Sciences University of Córdoba (IUCBC), Cordoba, Argentina.; Federal University of São Paulo, Sao Paulo, Brazil.; Sjögren Syndrome Research Group (AGAUR), Laboratory of Autoimmune Diseases Josep Font, IDIBAPS-CELLEX, Department of Autoimmune Diseases, ICMiD, University of Barcelona, Hospital Clínic, Barcelona, Spain.; Department of Medicine, University of Barcelona, Barcelona, Spain.