[1] Capital Med Univ, Dept Neurol, Beijing Tiantan Hosp, Tiantan West Number 6, Beijing 100050, Peoples R China
[2] China Natl Clin Res Ctr Neurol Dis, Beijing, Peoples R China
[3] Beijing Inst Brain Disorder, Ctr Stroke, Beijing, Peoples R China
[4] Beijing Key Lab Translat Med Cerebrovasc Dis, Beijing, Peoples R China