1. Heart and Vascular Centre, Semmelweis University, Budapest, Hungary
2. Faculty of Medicine, Institute of Surgical Pathology, University of Freiburg Medical Center, Freiburg, Germany
3. Faculty of Biology, University of Freiburg, Freiburg, Germany
4. Department of Cardiac Surgery, University Hospital Heidelberg, Heidelberg, Germany
5. Department of Cardiac Surgery, University Hospital Halle (Saale), Halle, Germany