1. Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht; Kantstraße 55 14513 Teltow Germany
2. Helmholtz Virtual Institute − Multifunctional Biomaterials for Medicine; Kantstr. 55 14513 Teltow Germany
3. Institute of Chemistry and Biochemistry, Freie Universität Berlin; Berlin Germany