1. Department of Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
2. Utrecht Trauma Center, Utrecht, the Netherlands
3. Regional Ambulance Facility Utrecht, Regionale Ambulance Voorziening Utrecht, Utrecht, the Netherlands
4. Department of Surgery, Diakonessenhuis Utrecht/Zeist/Doorn, Utrecht, the Netherlands
5. Department of Surgery, St. Antonius Hospital, Nieuwegein, the Netherlands
6. Department of Surgery, Meander Medical Center, Amersfoort, the Netherlands
7. Clinical Research Unit, Academic Medical Center, Amsterdam, the Netherlands