1. Department of Neurology, Weifang People's Hospital, Weifang, Shandong 261041, P.R. China
2. Department of Neurology, The Affiliated Qingdao Hiser Hospital of Qingdao University, Qingdao, Shandong 266033, P.R. China
3. Department of Encephalopathy, Traditional Chinese Medicine Hospital of Weifang, Weifang, Shandong 261041, P.R. China