1. Department of Plastic and Reconstructive Surgery, University Hospital Regensburg, Regensburg, Germany
2. Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
3. Institute for Heart and Circulation Research, Eißendorfer Pferdeweg, Hamburg-Harburg, Germany
4. Department of Anesthesiology, University of Regensburg, Regensburg, Germany
5. Department of Radiology, University Hospital Regensburg, Regensburg, Germany
6. Department of Biomaterials, Central Institute for Biomedical Engineering, University of Ulm, Ulm, Germany