LIN Yuan-xiang, XU Ru-xiang, JIANG Xiao-dan, KANG De-zhi, KE Yi-quan, DU Mou-xuan, CAI Ying-qian, QIN Ling-sha Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China; Department of Neurosurgery, First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, China