1 University Hospital Schleswig Holstein, Campus Lübeck, Department of Radiology and Nuclear Medicine, Lübeck, and University of Giessen, Department of Rheumatology and Clinical Immunology, Kerckhoff Clinic, Bad Nauheim, Germany.
2 University of Giessen, Department of Rheumatology and Clinical Immunology, Kerckhoff Clinic; u.mueller-ladner@kerckhoff-klinik.de.
3 University of Giessen, Department of Rheumatology and Clinical Immunology, Kerckhoff Clinic.