1. Division of Cardiology, Department of Internal Medicine, National Cardiovascular Center
2. Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
3. Department of Surgical Pathology, Hyogo College of Medicine
4. Division of Cardiology, Hokusetsu General Hospital
5. Department of Pathology, National Cardiovascular Center
6. Division of Cardiology, Department of Internal Medicine, Kinki University School of Medicine