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Keisuke Hoshi
Faculty of Medicine, Chiba University School of Medicine
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Hideyuki Miyauchi
Department of Cardiovascular Medi cine, Chiba University Graduate School of Medicine
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Ken-ichi Hirano
Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine
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Yoshio Kobayashi
Department of Cardiovascular Medi cine, Chiba University Graduate School of Medicine