[1] Chiba University Graduate School of Medicine,Department of Cardiovascular Medicine
[2] Kansai Medical University,Division of Cardiology, Department of Medicine II
[3] Saga University,Department of Cardiovascular Failure Therapy
[4] Kumamoto University,Department of Cardiovascular Medicine
[5] Yokohama City University Medical Center,Division of Cardiology
[6] Iwate Medical University Hospital,Department of Cardiology
[7] Gifu University Graduate School of Medicine,Department of Cardiology
[8] Tokai University Hospital,Department of Cardiology
[9] Kikuna Memorial Hospital,Department of Cardiovascular Medicine