1. From the Department of Radiology and Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada (M.G., M.A., B.M., M.H., A.D.); Department of Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia (M.A.); Department of Neurosurgery, University of Florida, Gainesville (K.F.); Department of Neurology, John Hunter Hospital, University of Newcastle, Callaghan, Australia (M.P.); Department of Neurology, Samsung Medical Center, Sungkyunkwan University, Seoul, Korea (O...