1 Department of Neurosurgery, West China Hospital/West China School of Medicine, Sichuan University, Chengdu, China.
2 Department of Health Management Center, West China Hospital/West China School of Nursing, Sichuan University, Chengdu, China.
3 Department of Neurosurgery, West China Hospital/West China School of Nursing, Sichuan University, Chengdu, China.
4 Department of Neurosurgery, West China Hospital/West China School of Medicine, Sichuan University, Chengdu, China. Electronic address: [email protected].