1. Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, Sichuan, China
2. Department of Neurosurgery, Nanchong Central Hospital, The Second Clinical Medical College of North Sichuan Medical College, Nanchong, China
3. Department of Radiology, Sichuan, University West China Hospital, Chengdu, Sichuan, China