1. Department of Anaesthesia, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China
2. Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China
3. Department of Hepatobiliary Surgery, Guangdong Province Traditional Chinese Medicine Hospital, Guangzhou, Guangdong 510120, P.R. China
4. Department of Cardiovascular Internal Medicine, Tianyou Hospital, Wuhan University of Science and Technology, Wuhan, Hubei 430064, P.R. China