[1] Capital Med Univ, Xuanwu Hosp, Dept Radiol, Beijing 100053, Peoples R China
[2] Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China
[3] Capital Med Univ, Xuanwu Hosp, Dept Neurol, Beijing, Peoples R China
[4] Univ Melbourne, Dept Med, Parkville, Vic 3010, Australia