1. Department of Cardiology, Keio University School of Medicine , 35 Shinanomachi Shinjuku-ku, Tokyo 160-8582 , Japan
2. One Brave Idea and Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women’s Hospital , Boston, MA , USA
3. Institute for Integrated Sports Medicine, Keio University School of Medicine , Tokyo , Japan
4. Department of Cardiovascular Medicine, Kyorin University Faculty of Medicine , Tokyo , Japan
5. Department of Cardiology, Saiseikai Central Hospital , Tokyo , Japan
6. Department of Cardiology, Sakakibara Heart Institute , Tokyo , Japan