1. Department Biocompatible Materials, Institute of Polymer Research Dresden & The Max Bergmann Center of Biomaterials Dresden, Hohe Strasse 6, 01069 Dresden, Germany, FRIZ Biochem GmbH, Staffelseestrasse 6, 81477 München, Germany, and Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, Canada, M5S 3G8