[1] Chongqing Med Univ, Dept Neurol, Affiliated Hosp 2, Chongqing, Peoples R China
[2] Chongqing Med Univ, Dept Neurol, Affiliated Hosp 3, Chongqing, Peoples R China
[3] Chongqing Med Univ, Dept Internal Med, Yongchuan Hosp, Chongqing, Peoples R China
[4] First Peoples Hosp Yunnan Prov, Dept Neurol, Kunming, Yunnan, Peoples R China
[5] Kunming Univ Sci & Technol, Dept Neurol, Affiliated Hosp, Kunming, Yunnan, Peoples R China
[6] Chongqing Med Univ, Dept Neurol, Affiliated Hosp 1, Chongqing, Peoples R China