From the Department of Neurology and Neurosurgery (A.A., M.A., M.L., R.M.), McGill University, Montreal, QC, Canada, National Neuroscience Institute (A.A), King Fahad Medical City, Riyadh, Saudi Arabia, Department of Neurology (M.A.), College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.