1. Department of Neurosurgery, Paracelsus Medical University, Nuremberg 90471, Bavaria, Germany
2. Department of Neurology, Paracelsus Medical University, Nuremberg 90471, Bavaria, Germany
3. Department of Neuroradiology, Nuremberg General Hospital, Nuremberg 90471, Bavaria, Germany
4. Department of Neuroradiology, Ingolstadt General Hospital, Ingolstadt 85049, Bavaria, Germany