1. Division of Cardiac Care Unit, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
2. Department of Epidemiology and Biostatistics, National Center of Neurology and Psychiatry
3. Division of Cardiology, Hakodate National Hospital
4. Division of Cardiology, Tokyo Medical Center
5. Division of Pediatric, Tokyo Metropolitan Children's Medical Centre
6. Department of Emergency Medicine, Osaka Medical College Hospital
7. Division of Cardiology, Takamatsu Medical Center National Hospital
8. Division of Cardiology, Sakaide City Hospital
9. Advanced Medical Emergency and Critical Care Center, Yamaguchi University Hospital
10. Division of Cardiology, Kanmon Medical Center
11. Division of Cardiology, Iwakuni Clinical Center
12. Division of Cardiology, Kokubu Seikyo Hospital
13. Division of Cardiology, Kagoshima Medical Center