1. Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies; Helmholtz-Zentrum Geesthacht Kantstr. 55, 14513 Teltow Germany
2. Institute of Chemistry, University of Potsdam; Karl-Liebknecht-Straße 24-25 14476 Potsdam Germany
3. Helmholtz Virtual Institute − Multifunctional Biomaterials for Medicine; Kantstr. 55 14513 Teltow Germany