1 Department of Trauma and Reconstructive Surgery, BG Trauma Center, Eberhard-Karls-University Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany.
2 Department of Hand, Plastic, Reconstructive and Burn Surgery, BG Trauma Center, Eberhard-Karls-University Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany.