1. Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
2. Department of Public Health, Osaka University Graduate School of Medicine, Osaka, Japan
3. Department of Advanced Clinical Advanced Clinical Epidemiology, Osaka University Graduate School of Medicine, Osaka, Japan
4. Dokkyo Medical University Saitama Medical Center, Saitama, Japan
5. Chiba University Hospital, Chiba, Japan
6. Fukui Cardiovascular Center, Fukui, Japan
7. The Sakakibara Heart Institute of Okayama, Okayama, Japan
8. Dokkyo University Medical School, Tochigi, Japan