Affiliation: | 2. Department of Anesthesiology, National Cerebral and Cardiovascular Center, Osaka, Japan;3. Department of Medical Statistics, Osaka City University, Osaka, Japan;4. Division of Adult Cardiac Surgery, National Cerebral and Cardiovascular Center, Osaka, Japan;5. Department of Preventive Medicine and Epidemiology, National Cerebral and Cardiovascular Center, Osaka, Japan |