1. First Department of Surgery, Hospital Lainz, Vienna, Austria.
2. Department of Materials and Institute for Biomedical Engineering, ETH, Zurich, Switzerland.
3. Kuros Biosurgery, Zurich, Switzerland.
4. Department of Cardiothoracic Surgery, University of Vienna, Vienna, Austria.
5. Christiaan Barnard Department for Cardiothoracic Surgery, Cape Heart Center, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa.