1. Department of Traumatology and General Surgery, Berufsgenossenschaftliche Unfallklinik Murnau, Murnau am Staffelsee, Germany
2. Department of Traumatology, Berufsgenossenschaftliche Unfallklinik Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany
3. Department of Orthopedic Surgery and Sports Traumatology, Sana Medical Centre, Witten/Herdecke University, Cologne, Germany
4. Center for Musculoskeletal Surgery, Charitè–University Medicine Berlin, Berlin, Germany
5. Department of Trauma and Orthopedic Surgery, Cologne Merheim Medical Center, Witten/Herdecke University, Cologne, Germany
6. Center for Musculoskeletal Surgery, Vivantes Klinikum, Berlin-Friedrichshain, Germany