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Shun-ichi Kawarai
Department of Cardiovascular Surgery, Aomori Prefectural Central Hospital, Japan
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Keisuke Kanda
Department of Cardiovascular Surgery, Aomori Prefectural Central Hospital, Japan
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Masaharu Hatakeyama
Department of Cardiovascular Surgery, Aomori Prefectural Central Hospital, Japan
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Koichi Nagaya
Department of Cardiovascular Surgery, Aomori Prefectural Central Hospital, Japan