1. Department of Cardiovascular Medicine Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
2. Department of Cardiovascular Medicine Fukuyama City Hospital Hiroshima Japan
3. Department of Cardiovascular Therapeutics Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
4. Department of Epidemiology Johns Hopkins Bloomberg School of Public Health Baltimore MD USA