1. Department of Neurosurgery, University of Edinburgh and NHS Lothian Western General Hospital, Edinburgh, United Kingdom.
2. Center for Clinical Brain Sciences, University of Edinburgh and NHS Lothian Western General Hospital, Edinburgh, United Kingdom.
3. School of Medicine, University of Edinburgh, Edinburgh, United Kingdom.
4. Department of Neurosurgery, NHS Lothian Western General Hospital, Edinburgh, United Kingdom.
5. Institute of Neurological Sciences, Queen Elizabeth University Hospital, Glasgow, United Kingdom.