1. Rheumatology, Medicine III, University Medical Center TU Dresden, Germany; 2Rheumatology, Department Medicine, Goethe University, Frankfurt/Main, Germany; 3Department Medicine, Rheumatology and Clinical Immunology, Charite Universitätsmedizin Berlin, Germany; 4Department Medicine, Rheumatology, Heinrich Heine University Duesseldorf, Germany; 5Department Medicine, Rheumatology, University of Regensburg, Germany; 6Department Medicine, Rheumatology, University of Graz, Germany; 7Department Medicine D,...