1. Department of Cardiology, Ashikaga Red Cross Hospital
2. Department Healthcare Quality Assessment, The University of Tokyo
3. Department of Cardiology, Keio University School of Medicine
4. Department of Cardiology, Kawasaki Municipal Hospital
5. Department of Cardiology, Saitama City Hospital
6. Department of Cardiology, Tokyo Dental University
7. Department of Cardiology, Yokohama Municipal Hospital