1. Department of Cardiovascular Medicine, Tohoku 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 Cardiovascular Medicine, Kawasaki Medical School
5. Department of Preventive Medicine and Epidemiology, National Cerebral and Cardiovascular Center
6. Division of Cardiology, Department of Internal Medicine, Iwate Medical University
7. Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine
8. Department of Cardiology, Sakakibara Heart Institute
9. Division of Cardiology, Yokohama City University Medical Center