1. Institute of Active Polymers and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Hereon, 14513 Teltow, Germany
2. Institute of Chemistry and Biochemistry, Free University of Berlin, 14195 Berlin, Germany
3. Helmholtz Virtual Institute − Multifunctional Biomaterials for Medicine, 14513 Teltow and Berlin, Germany
4. Institute of Chemistry, University of Potsdam, 14469 Potsdam, Germany