1. Department of Neurosurgery; University Hospital Zurich; Zurich Switzerland
2. Clinical Neuroscience Center; University Hospital Zurich; Zurich Switzerland
3. Department of Neurosurgery; Amsterdam UMC location University of Amsterdam; Amsterdam Netherlands
4. Amsterdam Neuroscience, Neurovascular Disorders; Amsterdam Netherlands
5. Department of Neurology; Amsterdam UMC location University of Amsterdam; Amsterdam Netherlands
6. Department of Neurology and Neurosurgery; University Medical Center Utrecht; Utrecht Netherlands