1. From the Department of Neurology and Stroke Center, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China (G.L., S.T., C.D., S.X., J.Z.); and State Key Laboratory of Oncology in Southern China, Imaging Diagnosis and Interventional Center, Cancer Center of Sun Yat-sen University, Guangzhou, China (K.P., C.X.).