1. Functional and Interactive Polymers Institute of Technical and Macromolecular Chemistry RWTH Aachen University Worringerweg 1 Aachen 52074 Germany
2. DWI – Leibniz Institute for Interactive Materials RWTH Aachen University Forckenbeckstraße 50 Aachen 52074 Germany
3. Helmholtz Institute for Biomedical Engineering BioInterface Group RWTH Aachen University Pauwelsstrasse 20 Aachen 52074 Germany
4. Institute of Pathology RWTH Aachen University Pauwelsstrasse 30 Aachen 52074 Germany
5. Electron Microscopic Facility University Clinics RWTH Aachen University Pauwelsstrasse 30 Aachen 52074 Germany