1. Division of Cardiology, Department of Internal Medicine, Iwate Medical University, Japan
2. Department of Cardiology, Kyorin University School of Medicine, Japan
3. Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Japan
4. Department of Cardiology, Dokkyo Medical University Saitama Medical Center, Japan
5. Department of Cardiovascular Medicine, Kitasato University Hospital, Japan
6. Department of Medicine, Teikyo University School of Medicine, Japan
7. Division of Cardiology, Department of Internal Medicine, Tokai University School of Medicine, Japan
8. Division of Cardiology, Saitama Medical University International Medical Center, Japan
9. Division of Cardiology, Dokkyo Medical University, Japan
10. Division of Cardiology, Dokkyo Medical University Nikko Medical Center, Japan