1. Department of Trauma-, Hand- and Reconstructive Surgery Friedrich Schiller University Jena, Erlanger Allee 101 07747 Jena, Germany
2. AO Research Institute Davos (ARI), AO Foundation Clavadelerstr. 8, 7270 Davos, Switzerland
3. Institute of Anatomy I, Friedrich Schiller University Jena Teichgraben 7, 07743 Jena, Germany
4. Department of Trauma- and Reconstructive Surgery, BG-Kliniken Bergmannstrost Halle, Merseburger Str. 165, 06112 Halle, Germany