1. Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
2. Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, Universitätsklinikum Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
3. Institut für Hygiene und Mikrobiologie, Universitätsklinikum Würzburg, Josef-Schneider-Str. 2, 97080 Würzburg, Germany