1 Division of Rheumatology and Clinical Immunology, Department 1 of Internal Medicine, Faculty of Medicine, University Hospital Cologne, University of Cologne, Center for Integrated Oncology, Aachen Bonn Cologne Duesseldorf and Center for Molecular Medicine Cologne (CMMC), University of Cologne.
2 Division of Rheumatology and Clinical Immunology, Department 1 of Internal Medicine, Faculty of Medicine, University Hospital Cologne, University of Cologne and Center for Integrated Oncology, Aachen Bonn Cologne Duesseldorf, Cologne, Germany.