1 From the Departments of Neurology and Stroke Center (H.C., J.Z.) and Radiology (Z.L., B.L.), The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China.
2 From the Departments of Neurology and Stroke Center (H.C., J.Z.) and Radiology (Z.L., B.L.), The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China. zengjs@pub.guangzhou.gd.cn.