Jun Huang1, Dan Li2, Ding Lei3. 1. Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China. 2. Department of Pathology, Chengdu University of TCM, Chengdu, Sichuan, People's Republic of China. 3. Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China. 931986796@qq.com.