1. Department of Neurology; Seoul National University Hospital; Seoul Korea
2. Department of Neurology; Korea University Guro Hospital; Seoul Korea
3. Calgary Stroke Program; Department of Clinical Neuroscience and Radiology; Hotchkiss Brain Institute; University of Calgary; Calgary Canada
4. Department of Neurology; Kangdong Sacred Heart Hospital; Hallym University College of Medicine; Seoul Korea
5. Department of Neurology; Seoul National University Bundang Hospital; Seongnam Korea