1. Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Density and Pharmaceutical Sciences
2. Department of Cardiology, Fukuyama City Hospital
3. Department of Cardiology, Kagawa Prefectural Central Hospital
4. Department of Cardiology, Okayama Medical Center
5. Department of Cardiology, Okayama Heart Clinic
6. Department of Cardiology, Mitoyo General Hospital