1. Department of Cardiology and Nephrology, Hirosaki University Graduate School of Medicine
2. Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
3. Department of Cardiology, Miyazaki Medical Association Hospital
4. Department of General Internal Medicine 3, Kawasaki Medical School
5. Department of Preventive Medicine and Epidemiologic Informatics, National Cerebral and Cardiovascular Center
6. Department of Cardiology, Tokyo Medical University Hospital
7. Department of Cardiology, Sakakibara Heart Institute
8. Division of Cardiology, Yokohama City University Medical Center
9. Department of Cardiovascular Medicine, Tohoku University
10. Kumamoto University