[1] Capital Med Univ, Beijing Tiantan Hosp, China Natl Clin Res Ctr Neurol Dis, Beijing 100070, Peoples R China
[2] Capital Med Univ, Beijing Tiantan Hosp, Dept Neurol, Beijing 100070, Peoples R China
[3] Shanghai Jiao Tong Univ, Ruijin Hosp, Sch Med, Inst Neurol,Dept Neurol, Shanghai 200020, Peoples R China
[4] Shanghai Jiao Tong Univ, Shanghai Jiao Tong Univ Affiliated Peoples Hosp 6, Sch Med, Dept Gerontol, Shanghai 200233, Peoples R China
[5] Univ Edinburgh, Psychol Dept, Edinburgh EH1 1LT, Midlothian, Scotland
[6] Univ New South Wales, Fac Med, Sch Med Sci, Sydney, NSW 2033, Australia