1. Interuniversity Centre for Health Economics Research, Vrije Universiteit Brussel, Brussels, Belgium
2. Emergency and Disaster Medicine, Department Emergency Medicine, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
3. Department of Neurosurgery, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
4. Department of Radiology, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium