[1] Second Peoples Hosp Chengdu, Dept Neurol, Chengdu, Peoples R China
[2] Nucl Ind 416 Hosp, Chengdu Coll, Affiliated Hosp 2, Dept Neurol, Chengdu, Peoples R China
[3] Chongqing Med Univ, Affiliated Hosp 1, Dept Neurol, Chongqing, Peoples R China
[4] Chongqing Med Univ, Yongchuan Hosp, Dept Neurol, Chongqing, Peoples R China