1 Division of Neurology, Department of Medicine (Tzankova), University of Toronto, Toronto, Ont.; Department of Clinical Neurosciences and Hotchkiss Brain Institute (Becker), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Clinical Neurological Sciences (Chan), Western University, London, Ont.
2 Division of Neurology, Department of Medicine (Tzankova), University of Toronto, Toronto, Ont.; Department of Clinical Neurosciences and Hotchkiss Brain Institute (Becker), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Clinical Neurological Sciences (Chan), Western University, London, Ont. tommy.chan@lhsc.on.ca.