1 Department of Neurosurgery, Peking University People's Hospital, 11th Xizhimen South St., Beijing, 100044, China. Electronic address: liujiayu@pku.edu.cn.
2 Department of Neurosurgery, Peking University People's Hospital, 11th Xizhimen South St., Beijing, 100044, China. Electronic address: baiyiner@126.com.
3 Department of Neurosurgery, Peking University People's Hospital, 11th Xizhimen South St., Beijing, 100044, China. Electronic address: liuruen@pku.edu.cn.