1. Department of Cardiovascular Medicine and Endocrinology and Metabolism, Faculty of Medicine Tottori University 36‐1 Nishicho Yonago 683‐8504 Japan
2. Department of Pathobiological Science and Technology, School of Health Science; Major in Clinical Laboratory Science, Faculty of Medicine Tottori University Yonago Japan
3. Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
4. Department of Cardiology Sakakibara Heart Institute Tokyo Japan
5. Department of Cardiovascular Medicine Nara Medical University Kashihara Japan
6. Department of Cardiovascular Medicine Fukushima Medical University Fukushima Japan