[1] Beijing Hosp, Dept Neurol, Natl Ctr Gerontol, 1 Dahua Rd, Beijing 100730, Peoples R China
[2] Peking Univ, Dept Neurol, Hosp 1, Beijing, Peoples R China
[3] Hebei Med Univ, Hosp 4, Dept Orthoped, Shijiazhuang, Hebei, Peoples R China
[4] Hebei Med Univ, Dept Med Oncol, Shijiazhuang, Hebei, Peoples R China
[5] Beijing Hosp, Natl Ctr Gerontol, MOH Key Lab Geriatr, 1 Dahua Rd, Beijing 100730, Peoples R China
[6] Chinese Acad Med Sci, Inst Pathogen Biol, MOH Key Lab Syst Biol Pathogens, Beijing 100730, Peoples R China
[7] Peking Union Med Coll, Beijing 100730, Peoples R China
[8] Hebei Med Univ, Hosp 4, Dept Surg 2, 12 Jiankang Rd, Shijiazhuang 050011, Hebei, Peoples R China