1. Department of Respiration, First People's Hospital of Yunnan Province, Kunming, Yunnan 650032, P.R. China
2. Department of Anesthesiology, Sun Yat‑Sen Memorial Hospital, Sun Yat‑Sen University, Guangzhou, Guangdong 510120, P.R. China
3. Department of Anesthesiology and Institute of Neurological Disease, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
4. Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan 650500, P.R. China