1. Department of Neurology, Universitair Medisch Centrum Groningen, The Netherlands
2. Department of Neurology, Universitair Ziekenhuis Brussel, Center for Neurosciences, Vrije Universiteit Brussel (VUB), Belgium
3. Department of Neurology and Neurosurgery, Universitair Medisch Centrum Utrecht, The Netherlands
4. Department of Medical Physics, Department of Radiology, Universitair Ziekenhuis Brussel, Belgium
5. Department of Neurology, Rijnstate Hospital, The Netherlands
6. Department of Clinical Neurosciences, Division of Neurology, University of Calgary, Canada