1. Department of Oncology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
2. Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, Hunan, P. R. China
3. Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China