1. Department of Cardiovascular Medicine, Course of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University
2. Division of Cardiology, Department of Internal Medicine, Tohoku University School of Medicine
3. Division of Cardiology, National Cardiovascular Center
4. Division of Cardiology, Hokusetsu General Hospital
5. Faculty of Health Management, Nagasaki Internal University
6. Division of Cardiology, Department of Internal Medicine, Kinki University School of Medicine