1. Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute (BPI), University Hospital of Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
2. Department of Chemical and Biochemical Engineering, Thompson Engineering Building, The University of Western Ontario, London, Ontario N6A 5B9, Canada
3. Department of Orthopedics, Orthopedic Center for Musculoskeletal Research, University of Würzburg, Brettreichstr. 11, 97074 Würzburg, Germany
4. Department of Trauma, Hand, Plastic and Reconstructive Surgery, University of Würzburg, Oberdürrbacher Str. 6, 97080 Würzburg, Germany
5. Department of Anatomy and Cell Biology, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, Ontario N6A 5C1, Canada