1. Department of Anesthesiology, Pain and Palliative Medicine, Radboud university medical center, Nijmegen, The Netherlands
2. Helicopter Emergency Medical Service, Lifeliner 3, Radboud university medical center, Nijmegen, The Netherlands
3. Department of Radiology, Haga Hospital, The Hague, The Netherlands
4. Fontys University of Applied Sciences, Eindhoven, The Netherlands
5. Emergency Department, Flevoziekenhuis, Almere, The Netherlands