作者单位:Gen Hosp Beijing Mil Reg, Affiliated Bayi Brain Hosp, Beijing 100700, Peoples R China[1]Anhui Med Univ, Clin Coll Gen Hosp Beijing Mil Reg, Hefei, Peoples R China[2]Hebei Med Univ, Hosp 4, Shijiazhuang 050000, Peoples R China[3]Peoples Hosp Feicheng Shandong Prov, Feicheng, Peoples R China[4]