1. Department of Cardiovascular Surgery, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
2. Department of Cardiovascular Surgery, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
3. Department of Surgical Intensive Care, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
4. Department of Transplantation, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
5. Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan