1. Leibniz Research Laboratory for Biotechnology and Artificial Organs, Department of Thoracic and Cardiovascular Surgery, Hannover Medical School, Hannover, Germany.
2. Department of Cardiac Surgery, Heidelberg University Hospital, Heidelberg, Germany.
3. Fraunhofer Institute for Interfacial Engineering and Biotechnology, Stuttgart, Germany.
4. Department of Experimental Cardiology, Max-Plank-Institute, Bad Nauheim, Germany.
5. Department of Cardiology, Evangelische Krankenhaus, Hamm, Germany.