1 Department of Critical Care Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No. 32 West Section 2, First Ring Road, Chengdu, Sichuan, China.
2 Science and Education Department, Wuhan Red Cross Hospital, No. 392 Hongkong Road, Wuhan, Hubei, China.
3 Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan, Hubei, China.
5 Medical Service Center of Sichuan Province, No.2-3 South Yulin Street, Chengdu, Sichuan, China.
6 Department of Critical Care Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No. 32 West Section 2, First Ring Road, Chengdu, Sichuan, China. drhuangxb@163.com.