1. Department of Neurology, Liaocheng People’s Hospital, Liaocheng, Shandong Province, P.R. China
2. Department of Neurosurgery, Liaocheng People's Hospital, Liaocheng, Shandong Province, P.R. China
3. Department of Neurology, Dong'e County People’s Hospital, Donge County, Liaocheng, Shandong Province, P.R. China.