1 Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, BC V6H 3N1, Canada; Neuroethics Canada, Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, BC V6H 3N1, Canada; University of British Columbia, Vancouver, BC V6H 3N1, Canada; BC Children's Hospital Research Institute, Vancouver, BC, Canada. Electronic address: patrick.mcdonald@cw.bc.ca.
2 Neuroethics Canada, Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, BC V6H 3N1, Canada.
3 Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON, Canada.
4 Division of Neurosurgery, Department of Surgery, University of British Columbia, Vancouver, BC V6H 3N1, Canada.