1. Department of Neurosurgery, Medical University Innsbruck, Innsbruck, Austria.
2. Department of Neuroradiology, Medical University Innsbruck, Innsbruck, Austria.
3. Department of Neurology, Medical University Innsbruck, Innsbruck, Austria.
4. Department of Neuroimaging Research Core Facility, Medical University Innsbruck, Innsbruck, Austria.