1Department of Anesthesiology, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P. R. China.
2Department of Neurosurgery, Huizhou Municipal Central People’s Hospital, Huizhou 516001, P. R. China.
3Department of Neurosurgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P. R. China.
Email: [email protected]