1. Division of Cardiology Teikyo University Hospital Tokyo Japan
2. Department of Cardiology Keio University School of Medicine Tokyo Japan
3. Department of Medicine, One Brave Idea and Division of Cardiovascular Medicine Brigham and Women's Hospital Boston USA
4. Department of Cardiology Toyohashi Heart Center Toyohashi Japan
5. Department of Cardiology Nagoya Heart Center Nagoya Japan
6. Division of Cardiology Mitsui Memorial Hospital Tokyo Japan
7. Department of Hygiene and Public Health Nippon Medical School Tokyo Japan
8. Center for Clinical Research Nippon Medical School Hospital Tokyo Japan