1. Department of Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
2. Department of Radiology, Beijing Xuanwu Hospital, Capital Medical University, Beijing, China
3. Department of Neurosurgery, SanBo Brain Hospital, Capital Medical University, Beijing, China
4. Department of Neuroradiology, Beijing Neurosurgical Institute, Affiliated Beijing Tiantan Hospital, Capital Medical University, Beijing, China