1. Division of Neurosurgery Toronto Western Hospital University Health Network University of Toronto Toronto Ontario Canada
2. Department of Neurosurgery Tartu University Hospital Neurology Clinic University of Tartu Tartu Estonia
3. Section of Neurosurgery Health Sciences Centre University of Manitoba Winnipeg Manitoba Canada
4. Division of Neurosurgery Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke University of Sherbrooke Sherbrooke Quebec Canada
5. Department of Neurosurgery School of Medicine University of Louisville Louisville Kentucky USA
6. Joint Department of Medical Imaging University of Toronto Toronto Ontario Canada
7. Schulich School of Medicine and Dentistry Western University London Ontario Canada
8. Krembil Research Institute Toronto Ontario Canada