1. Department of Trauma and Reconstructive Surgery, BG Clinic Bergmannstrost Halle, Germany
2. Department of Trauma, Hand and Reconstructive Surgery, Jena University Hospital, Friedrich Schiller University, Jena, Germany
3. Center for Spinal and Scoliosis Surgery, Waldkrankenhaus Erlangen, Germany
4. Department of Orthopedics and Traumatology, Paracelsus Private Medical University Nuremberg, Germany
5. Department of Science, Research and Education, BG Clinic Bergmannstrost Halle, Germany
6. Department of Spine Surgery and Neurotraumatology, Sana Klinikum Borna, Borna, Germany
7. Center for Orthopaedics and Trauma Surgery, University Hospital Giessen-Marburg, Germany
8. Department of Trauma and Orthopedic Surgery, Klinikum Traunstein, Germany
9. Department of Neurosurgery, Jena University Hospital, Friedrich Schiller University, Germany
10. Department of Spine Surgery, Schoen-Clinic Hamburg Eilbek, Hamburg
11. Medical Faculty Technical University of Munich, Germany
12. Department of Orthopedic and Trauma Surgery, University Medical Center Schleswig-Holstein, Campus Kiel, Germany
13. Hirslanden Clinic St Anna, University of Lucerne, Lucerne, Switzerland; Department of Trauma, University Hospital Zurich (USZ), University of Zurich (UZH), Switzerland
14. Department of Spine Surgery, Thuringia Clinic “Georgius Agricola” Saalfeld, Teaching Hospital of the University of Jena, Germany
15. Department of Trauma and Orthopedic Surgery, University Hospital Erlangen, Germany
16. Department for Paraplegia and Spine Surgery, BG Clinic Tuebingen, Tuebingen, Germany
17. Clinic of Trauma- Hand- and Reconstruction Surgery, AMEOS-Clinic Halberstadt, Germany
18. Department of Trauma Surgery and Orthopedics, Regiomed Clinical Center Coburg, Germany
19. Faculty of Medicine and University Hospital Cologne, Department of Orthopaedic and Traumatology, University of Cologne, Germany
20. Department of Orthopaedics, Trauma and Plastic Surgery, University Hospital Leipzig, Germany