1. Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
2. Legal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
3. Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
4. Paediatric Sport Medicine, Altona Childrens Hospital, Hamburg, Germany
5. Traumatology, BG-Hospital Hamburg-Boberg, Hamburg, Germany
6. Traumatology, Asklepios Hospital Hamburg Heidberg, Hamburg, Germany
7. Traumatology, Asklepios Hospital Hamburg Harburg, Hamburg, Germany
8. Traumatology, Asklepios Hospital Hamburg Rissen, Hamburg, Germany
9. Traumatology, Asklepios Hospital Hamburg St. Georg, Hamburg, Germany
10. Traumatology, BG-Hospital Berlin Marzahn, Berlin, Germany
11. Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany