1. The Fourth Department of Encephalopathy, Weifang Hospital of Traditional Chinese Medicine, Weifang, Shandong 261041, P.R. China
2. Brain Center, Sunshine Union Hospital, Weifang, Shandong 261000, P.R. China
3. Department of Neurology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China