1. Department of Paraplegiology, BG Trauma Centre Ludwigshafen, Ludwigshafen, Germany
2. Heidelberg Trauma Research Group, Department of Trauma and Reconstructive Surgery, Center for Orthopaedics, Trauma Surgery and SCI, Heidelberg University Hospital, Heidelberg, Germany
3. Department of Trauma Surgery and Orthopaedics, BG Trauma Centre Ludwigshafen, Ludwigshafen, Germany
4. Aschaffenburg Trauma and Orthopaedic Research Group, Center for Orthopaedics, Trauma Surgery and Sports Medicine, Hospital Aschaffenburg-Alzenau, Aschaffenburg, Germany