1. Department of Medical Science and Cardiorenal Medicine Yokohama City University Graduate School of Medicine Yokohama Japan
2. Division of Cardiology Yokohama City University Medical Center Yokohama Japan
3. Kawaguchi Cardiovascular and Respiratory Hospital Kawaguchi Japan
4. Department of Biostatistics Yokohama City University School of Medicine Yokohama Japan
5. Yokosuka City Hospital Yokosuka Japan