1. Department of Neurosurgery, Third Xiangya Hospital, Central South University, Changsha, Hunan 410000, P.R. China
2. Department of Neurosurgery, Zhuzhou Central Hospital, Zhuzhou, Hunan 412000, P.R. China
3. Department of Anatomy and Neurobiology, Xiangya Medicine School, Central South University, Changsha, Hunan 410000, P.R. China
4. Department of Neurosurgery, The Fifth Sun Yet‑sen Hospital, Sun Yet‑sen University, Zhuhai, Guangdong 519000, P.R. China