1. Department of Anatomy; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
2. Department of Neurosurgery; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
3. Donders Institute for Brain; Cognition and Behaviour; Radboud University Nijmegen; Nijmegen The Netherlands
4. Institute for Biomedical Technology and Technical Medicine (MIRA), Faculty of Science and Technology, University of Twente; Enschede The Netherlands