1. Department of Neurosurgery, Shulan (Hangzhou) Hospital, Hangzhou, Zhejiang 310003, P.R. China
2. Department of Neurobiology, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310000, P.R. China
3. Department of Neurosurgery, Hangzhou Mingzhou Brain Rehabilitation Hospital, Hangzhou, Zhejiang 310012, P.R. China
4. Department of Osteology, Hangzhou Red Cross Hospital, Hangzhou, Zhejiang 310004, P.R. China
5. Department of Neurosurgery, The First Affiliated Hospital of Medical School of Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China