[1] Capital Med Univ, Xuanwu Hosp, Neurol Dept, Beijing 100053, Peoples R China
[2] Capital Med Univ, Xuanwu Hosp, Dept Evidence Based Med, Beijing, Peoples R China
[3] Beijing Univ Chinese Med, Affiliated Hosp 3, Neurol Dept, Beijing, Peoples R China
[4] Shanxi Univ Chinese Med, Jinzhong, Peoples R China
[5] Peking Univ, Beijing Huilongguan Hosp, HuiLongGuan Clin Med Sch, Beijing 100096, Peoples R China