1. Department of Neurosurgery, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450053, China
2. Department of Neurosurgery, Cancer Center, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang 310006, China
3. Department of Neurosurgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150001, China
4. Department of Neurosurgery, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian 116000, China