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Yoshiaki Aizawa
Division of Cardiology, Sapporo National Hospital
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Takashi Takenaka
Division of Cardiology, Sapporo National Hospital
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Masashi Horimoto
Division of Cardiology, Sapporo National Hospital
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Masafumi Fujiwara
Division of Cardiology, Sapporo National Hospital
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Morie Sekiguchi
The First Department of Internal Medicine, Shinsyu University School of Medicine
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Hidehiko Maezawa
The First Department of Internal Medicine, Shinsyu University School of Medicine