1. From the Stroke Center (J.-H.P.) and the Department of Diagnostic Neuroradiology (E.-J.L.), Kwandong University Myongji Hospital, Goyang, Korea; the Department of Neurology (K.-S.H.), Inje University Ilsan Paik Hospital, Goyang, Korea; the Department of Biostatistics (J.L.), College of Medicine, Korea University, Seoul, Korea; and the Department of Neurology (D.-E.K.), Dongguk University Ilsan Hospital, Goyang, Korea.