1. Department of Neurology, Anqiu People's Hospital, Weifang, Shandong 262100, P.R. China
2. Department of Neurosurgery, Anqiu People's Hospital, Weifang, Shandong 262100, P.R. China
3. Department of Electrocardiography, Anqiu People's Hospital, Weifang, Shandong 262100, P.R. China