Zongli Han1, Yanli Du2, Hui Qi3. 1. Department of Neurosurgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Futian District, Shenzhen, 518036, Guangdong, People's Republic of China. 2. School of Medical Technology and Nursing, Shenzhen Polytechnic, Shenzhen, Guangdong, People's Republic of China. 3. Department of Neurosurgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Futian District, Shenzhen, 518036, Guangdong, People's Republic of China. publicjournal@163.com.