[1] Capital Med Univ, Xuanwu Hosp, Dept Neurobiol & Neurol, Beijing, Peoples R China
[2] Chinese Acad Med Sci, Beijing Hosp, Natl Ctr Gerontol, Dept Neurol,Inst Geriatr Med, Beijing, Peoples R China
[3] Chinese Acad Med Sci, Beijing Hosp, Natl Ctr Gerontol, Dept Radiol,Inst Geriatr Med, Beijing, Peoples R China
[4] Peking Union Med Coll, Grad Sch, Beijing, Peoples R China
[5] Chinese Acad Med Sci, Inst Geriatr Med, Beijing Hosp, Dept Stat,Natl Ctr Gerontol, Beijing, Peoples R China
[6] MR Res China, GE Healthcare, Beijing, Peoples R China