1. Department of Mechanical and Process Engineering, Product Development Group Zurich, ETH Zurich;
2. Department of Neurosurgery, University Hospital Zurich;
3. Translational Research Center, University Hospital of Psychiatry and Psychotherapy, University of Bern, Switzerland;
4. Department of Neurosurgery, Section of Pediatric Neurosurgery, University Hospital Tübingen, Germany; and
5. Department of Mechanical and Process Engineering, Institute for Dynamic Systems and Control, ETH Zurich, Switzerland