[1] N Sichuan Med Coll, Clin Med Coll 2, Dept Neurol, Nanchong, Sichuan, Peoples R China
[2] Hong Kong Baptist Univ, Sch Chinese Med, Hong Kong, Hong Kong, Peoples R China
[3] Sichuan Univ, W China Hosp, Dept Neurol, Chengdu 610064, Sichuan, Peoples R China
[4] Fudan Univ, Hua Shan Hosp, Dept Neurol, Shanghai 200433, Peoples R China