1. Department of Cardiovascular Surgery; Düsseldorf University Hospital; Germany
2. Institute for Experimental Surgery; Düsseldorf University Hospital; Germany
3. Department of Cardiac Surgery; University Hospital Heidelberg; Germany
4. Helmholtz Group for Cell Biology; German Cancer Research Centre; Heidelberg Germany
5. Institute for Applied Physical Chemistry; University of Heidelberg; Germany
6. Institute for Transplantation Diagnostics and Cell Therapeutics; Düsseldorf University Hospital; Germany