1. Japan Foundation for Cardiovascular Research
2. Cardiovascular Center, Toho University Medical Center Sakura Hospital
3. Department of Cardiology, Tokyo Jikei University School of Medicine
4. Department of Cardiology, Toho University Medical Center Ohmori Hospital
5. Department of Cardiology, Funabashi-Futawa Hospital
6. Clinical Physiology, Toho University Medical Center Sakura Hospital