1. Department of Cardiovascular Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
2. Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
3. Jinnouchi Hospital, Kumamoto, Japan
4. Department of Biostatistics and Epidemiology, Yokohama City University Medical Center, Yokohama, Japan
5. Department of General Medicine, Yamaguchi University Hospital, Yamaguchi, Japan
6. Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan