1. From the Department of Radiology, Severance Stroke Center, Severance Hospital (Y.C., B.M.K., D.J.K.), Department of Neurology, Severance Stroke Center, Severance Hospital (J.H.H., H.S.N., Y.D.K), and Department of Neurology, Gangnam Severance Hospital (K.-Y.L.), Yonsei University College of Medicine, Seoul, South Korea; Department of Neurology (O.Y.B.) and Department of Radiology (P.J.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; Department of Neurology,...