1 Department of Neurosurgery, Longyan Second Hospital of Fujian Province, Fujian Province, P. R. China.
2 Department of Neurosurgery, Neurosurgery Research Institute, The First Affiliated Hospital, Fujian Medical University, Fujian Province, P. R. China.
3 Department of Neurosurgery, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou 350212, Fujian, P. R. China.
4 Department of Pathology, Longyan Second Hospital of Fujian Province, P. R. China E-mail: lyx99070@126.com.