1. Department of Cardiology, The Heart Institute of Japan, Tokyo Women’s Medical University
2. Division of Cardiology, Cardiovascular Center, Saisei-Kai Kumamoto Hospital
3. Department of Cardiology, Sakakibara Heart Institute
4. Division of Cardiology, Tokyo Metropolitan Tama Medical Center
5. Department of Cardiology, Seirei Hamamatsu General Hospital
6. Department of Cardiology, Saisei-Kai Kurihashi Hospital
7. Department of Cardiology, Cardiovascular Center of Sendai