1. Department of Speech-Language Pathology, University of Toronto, Ontario, Canada
2. Rehabilitation Sciences Institute, University of Toronto, Ontario, Canada
3. Sunnybrook Research Institute, Toronto, Ontario, Canada
4. KITE—Toronto Rehabilitation Institute, University Health Network, Ontario, Canada
5. Alberta Health Services, Edmonton, Canada
6. Department of Medicine (Neurology), University of Toronto, Ontario, Canada
7. Department of Medicine (Neurology), University of Alberta, Edmonton, Canada