1. Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, People's Republic of China
2. Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, People's Republic of China
3. Department of Neurology, Aerospace Center Hospital and Peking University Aerospace School of Clinical Medicine, Beijing, People's Republic of China
4. Department of General Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, People's Republic of China