1. Department of Trauma-, Hand- and Reconstructive Surgery; Friedrich-Schiller University Jena; Erlanger Allee 101 Jena 07740 Germany
2. Department of Foot- and Ankle Surgery; Katholisches Klinikum Mainz; Mainz Germany
3. Department of Trauma- and Reconstructive Surgery Trauma Center; Berufsgenossenschaftliche Kliniken; Bergmannstrost Halle Germany