1. Department of Anatomy; Donders Institute for Brain, Cognition & Behavior; Radboud University Medical Center; Nijmegen The Netherlands
2. Department of Neurosurgery; Radboud University Medical Center; Nijmegen The Netherlands
3. Department of Anesthesiology, Pain and Palliative Medicine; Radboud University Medical Center; Nijmegen The Netherlands
4. Department of Pain Management and Palliative Care; Canisius Wilhelmina Hospital; Nijmegen The Netherlands