1. Division of Cardiology, Mitsui Memorial Hospital
2. Division of Cardiology, Department of Internal Medicine, Teikyo University School of Medicine
3. Division of Cardiology, Iwatsuki Minami Hospital
4. Division of Cardiology, Toyohashi Heart Center
5. Department of Cardiology, Hiroshima City Hiroshima Citizens Hospital
6. Department of Cardiology, Kokura Memorial Hospital
7. Department of Cardiology, Yokohama City University Medical Center
8. Division of Cardiology, Mito Brain Heart Center
9. Division of Cardiology, Tokai University School of Medicine