1. Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China (mainland)
2. Department of Anesthesiology, The People’s Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China (mainland)
3. Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-Sen University, Nanning, Guangxi, China (mainland)