[Wang, Si-bo; Jiang, Xiao-han; Xing, Ying-qi] Jilin Univ, Hosp 1, Neurosci Ctr, Dept Neurol, Changchun, Jilin, Peoples R China.
[Tian, Qian] Peoples Hosp Linyi City, Dept Neurol, Linyi, Peoples R China.
[Zhong, Chi] Weifang Peoples Hosp, Dept Neurol, Weifang, Peoples R China.
[Zhang, Guan-ling] Ctr Hosp Changsha City, Dept Ultrasound, Changsha, Hunan, Peoples R China.
[Li, Ya-jie] Ctr Hosp Jilin City, Diagnost Ultrasound Ctr, Jilin, Jilin, Peoples R China.