1. Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
2. Helmholtz Virtual Institute, “Multifunctional Biomaterials for Medicine”, Teltow, Germany
3. Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
4. Institute of Chemistry, University of Potsdam, Potsdam, Germany