1. Department of Neurosurgery, Xinglin Branch of The First Affiliated Hospital of Xiamen University, Xiamen, Fujian 361003, P.R. China
2. Department of Neurosurgery, Heze Municipal Hospital, Heze, Shandong 274031, P.R. China
3. Department of Pharmacology, Heze Medical College, Heze, Shandong 274000, P.R. China