1. University of Ulm, ZBMT, Department of Biomaterials, Ulm, Germany
2. Institute for Biological Interfaces, Karlsruhe Institute of Technology (KIT) Karlsruhe, Germany
3. Institute for Heart and Circulation Research, Hamburg, Germany
4. Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany