1. Department of Medicine III University Hospital Bonn Bonn Germany
2. Mildred Scheel School of Oncology, Medical Faculty University Hospital Bonn Bonn Germany
3. Department of Cell Biology Institute for Biomedical Engineering Aachen Germany
4. Institute of Anatomy and Experimental Morphology University Cancer Center, University Medical Center Hamburg‐Eppendorf Hamburg Germany
5. Institute of Pathology University Hospital Bonn Bonn Germany