1. Medical Department II, Hematology and Oncology, Christian-Albrechts University of Kiel and University Hospital Schleswig-Holstein, Germany
2. University Cancer Center Schleswig-Holstein, University Hospital Schleswig-Holstein, Kiel and Lübeck, Germany
3. Institute of Immunology, Christian-Albrechts University of Kiel and University Hospital Schleswig-Holstein, Germany
4. Department of Medicine II, Goethe University Hospital, Frankfurt, Germany