1. Polymer Chemistry and Biomaterials Research Group, Ghent University, Krijgslaan 281 S4-bis, 9000 Ghent, Belgium, Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i., Videnska 1083, 142 20 Prague 4, Czech Republic, and Biohybrid Systems, Fraunhofer Institute for Biomedical Engineering, Ensheimerstr. 48, 66386 St. Ingbert, Germany