1. Department of Plastic and Hand Surgery; Faculty of Medicine, Medical Center, University of Freiburg; Freiburg Germany
2. Laboratory for MEMS Applications, IMTEK, Department of Microsystems Engineering; University of Freiburg, Georges-Koehler-Allee 103; Freiburg 79110 Germany
3. Hahn-Schickard, Georges-Koehler-Allee 103; Freiburg 79110 Germany
4. FIT - Freiburg Centre for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Koehler-Allee 105; Freiburg 79110 Germany