1. Department of Neurosurgery, Affiliated Xiaolan Hospital, Southern Medical University, Xiaolan People's Hospital of Zhongshan, Zhongshan, Guangdong 528415, P.R. China
2. Department of Neurosurgery, Affiliated Xiaolan Hospital, Southern Medical University, Xiaolan People's Hospital of Zhongshan, Zhongshan, Guangdong 528415, P.R. China