1. Department of Cardiovascular Medicine, Nephrology and Neurology University of the Ryukyus School of Medicine Okinawa Japan
2. Department of Medical Science and Cardiorenal Medicine Yokohama City University Graduate School of Medicine Yokohama Japan
3. Division of Cardiology Yokohama City University Medical Center Yokohama Japan
4. Department of Cardiovascular Medicine Kobe City Medical Center General Hospital Kobe Japan
5. Department of Cardiovascular Medicine Kurashiki Central Hospital Kurashiki Japan
6. Department of Nephrology Kurashiki Central Hospital Kurashiki Japan