1. Department of Trauma Surgery, University Medical Center Utrecht, Utrecht, The Netherlands
2. Department of Orthopedic and Trauma Surgery, Cantonal Hospital Lucerne, Lucerne, Switzerland
3. Department of Traumatology, John Hunter Hospital & University of Newcastle, Newcastle, New South Wales, Australia
4. Department of Trauma Surgery, University Medical Center Groningen, Groningen, The Netherlands
5. Department of Trauma Surgery, Elisabeth TweeSteden Hospital, Tilburg, the Netherlands
6. Department of Trauma Surgery, Radboud University Medical Center, Nijmegen, The Netherlands
7. Department of Thoracic Surgery, Cantonal Hospital Lucerne, Lucerne, Switzerland
8. Department of Trauma Surgery, Haaglanden Medical Center, The Hague, The Netherlands