1. Department of Cardiology, National Hospital Organization, Ibusuki Hospital, Japan
2. Department of Cardiology, National Hospital Organization, Kagoshima Medical Center, Japan
3. Department of Cardiovascular Surgery, National Hospital Organization, Kagoshima Medical Center, Japan
4. Department of Clinical Pathology, National Hospital Organization, Kagoshima Medical Center, Japan
5. Department of Hematology, National Hospital Organization, Kagoshima Medical Center, Japan