1. Institute of Technical and Macromolecular Chemistry and DWI - Leibniz Institute for Interactive Materials; RWTH Aachen University; Forckenbeckstraße 50, 52056 Aachen Germany
2. BioMediTech Department; University of Tampere; Lääkärinkatu 1, FI-33520 Tampere Finland
3. Department of Biological and Environmental Science and Nanoscience Center; University of Jyvaskyla; Survontie 9, FI-40500 Jyvaskyla Finland
4. Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute; University of Würzburg; Pleicherwall 2, 97070 Würzburg Germany