1 Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, Sichuan, China.
2 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.
3 Department of Neurosurgery, West China Hospital of Sichuan University, Chengdu, Sichuan, China. Electronic address: enforest@gmail.com.