1. From the Division of Neurology, Department of Medicine and Therapeutics (L.X., H.L., Y.O.Y.S., X.C., V.H.L.I., V.C.T.M., K.S.W., T.W.H.L.) and Department of Imaging and Interventional Radiology (W.C.W.C.), The Chinese University of Hong Kong; and Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou, China (G.T.).