1. Department of Cardiac Surgery, Medical Faculty Heinrich‐Heine‐University Medical School Moorenstraße 5 Duesseldorf 40225 Germany
2. Department of Cardiology, Pulmonology and Vascular Medicine Heinrich‐Heine‐University Medical School Duesseldorf Germany
3. Institute of Pathology Heinrich‐Heine‐University Medical School Duesseldorf Germany