1. Department for Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
2. Center for Musculoskeletal Surgery, Charité Universitätsmedizin Berlin, Berlin, Germany
3. Department of Trauma and Orthopedic Surgery, BG-Klinik Ludwigshafen, Ludwigshafen, Germany
4. AKK Altonaer Kinderkrankenhaus, Hamburg, Germany
5. Department for Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany
6. Department for Orthopedic Surgery, Trauma Surgery and Sport Injuries, Kliniken der Stadt Köln, Cologne, Germany
7. Department of Human Factors Training, Lufthansa Aviation Training, Berlin, Germany