1. Helmholtz Institute for Biomedical Engineering BioInterface Group RWTH Aachen University Pauwelsstrasse 20 52074 Aachen Germany
2. Interdisciplinary Centre for Clinical Research RWTH Aachen University Pauwelsstrasse 30 52074 Aachen Germany
3. Institute for Technical and Macromolecular Chemistry RWTH Aachen University Worringerweg 1 52074 Aachen Germany
4. DWI – Leibniz Institute for Interactive Materials RWTH Aachen University Forckenbeckstraße 50 52074 Aachen Germany
5. Aachen Maastricht Institute for Biobased Materials (AMIBM) Maastricht University Brightlands Chemelot Campus, Urmonderbaan 22 Geleen 6167 RD The Netherlands
6. Department of Orthodontics University Hospital RWTH Aachen 52074 Aachen Germany
7. Electron Microscopy Facility Institute of Pathology RWTH Aachen University Pauwelsstrasse 30 52074 Aachen Germany
8. Institute of Pathology RWTH Aachen University Pauwelsstrasse 30 52074 Aachen Germany