1. Department of OrthopaedicsUniversity Medical Center UtrechtUtrecht University 3584 CX Utrecht The Netherlands
2. Department of Clinical SciencesFaculty of Veterinary MedicineUtrecht University 3584 CX Utrecht The Netherlands
3. Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer InstituteUniversity of Würzburg Pleicherwall 2 97070 Würzburg Germany
4. Department of Trauma, Hand, Plastic and Reconstructive SurgeryUniversity of Würzburg Oberdürrbacher Str. 6 97080 Würzburg Germany