1 College of Clinical Medicine, Jilin University, Changchun, China.
2 Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China; Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
3 Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China.
4 Department of Neurosurgery, Xuan Wu Hospital of Capital Medical University, Beijing, China. Electronic address: chengye_jdyy@126.com.