1. Department of Functional Materials for Medicine and Dentistry and Bavarian Polymer Institute; University of Wuerzburg; Pleicherwall 2 97070 Wuerzburg Germany
2. Christchurch Regenerative Medicine and Tissue Engineering (CReaTE) Group; Department of Orthopaedic Surgery and Musculoskeletal Medicine; University of Otago Christchurch; Christchurch 8011 New Zealand
3. Department of Trauma; Hand, Plastic and Reconstructive Surgery; University of Wuerzburg; Oberduerrbacher Str. 6 97080 Wuerzburg Germany