1. Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
2. Division of Cardiovascular Center, Department of Internal Medicine, Kinki University School of Medicine
3. Department of Cardiovascular Surgery, Nippon Medical School
4. Department of Heart Rhythm Management, University of Occupational and Environmental Health, Japan
5. Department of Cardiology, Tsukuba University Hospital Mito Medical Center
6. The First Department of Internal Medicine, Niigata University School of Medicine
7. Department of Pharmacology, St. Marianna University School of Medicine
8. Faculty of Health and Medical Care, Saitama Medical University
9. Faculty of Health Sciences, Yamaguchi University Graduate School of Medicine
10. Tachikawa Hospital
11. The Sakakibara Heart Institute of Okayama
12. Department of Research and Development, Tachikawa Medical Center