Affiliation: | 1.German Rheumatism Research Centre, Epidemiology Unit, Charitéplatz 1, 10117, Berlin, Germany ;2.Charité Universitätsmedizin, Institute of Biostatistics and Clinical Epidemiology, Berlin, Germany ;3.Medical Faculty, Policlinic for Rheumatology and Hiller Research Centre for Rheumatology, Heinrich-Heine-University Duesseldorf, Duesseldorf, Germany ;4.Department of Rheumatology and Clinical Immunology, Charité Universitätsmedizin, Berlin, Germany ;5.Department of Rheumatology and Clinical Immunology, Eberhard Karls-University of Tuebingen, Tuebingen, Germany ; |