1. Department of Anesthesiology, Fuwai Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
2. Department of Anesthesiology, Qingdao Fuwai Cardiovascular Hospital, Qingdao, Shandong Province, China
3. Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
4. Department of Anesthesiology, UF Health Shands Hospital, University of Florida, Gainesville, FL, USA