[1] Capital Med Univ, Xuanwu Hosp, Natl Clin Res Ctr Geriatr Disorders, Beijing, Peoples R China
[2] Fourth Peoples Hosp Shenyang, Dept Geriatr Ctr, Shenyang, Liaoning, Peoples R China
[3] Capital Med Univ, Dept Neurobiol Neurol & Geriatr, Xuanwu Hosp, Beijing, Peoples R China
[4] Yueyang Cent Hosp, Dept Neurol, Yueyang City, Peoples R China
[5] Harbin Med Univ, Affiliated Hosp 4, Dept Neurol, Harbin, Peoples R China
[6] Baoding 1 Cent Hosp, Dept Neurol, Baoding, Peoples R China
[7] Third Hosp Jinan, Dept Pathol, Jinan, Peoples R China
[8] Zhumadian Cent Hosp, Dept Neurol, Zhumadian, Peoples R China
[9] Capital Med Univ, Xuanwu Hosp, Dept Neurol, 45 Changchun Rd, Beijing 100053, Peoples R China