1. Department of Public Health, Interuniversity Centre of Health Economics Research, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
2. Emergency and Disaster Medicine, Department of Emergency Medicine, Universitair Ziekenhuis Brussel, Brussels, Belgium
3. Department of Neurosurgery, Universitair Ziekenhuis Brussel, Brussels, Belgium
4. Department of Radiology, Universitair Ziekenhuis Brussel, Brussels, Belgium
5. Department of Medical Registration, Universitair Ziekenhuis Brussel, Brussels, Belgium