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Katsuaki Tsukioka
Department of Cardiovascular Surgery, Matsumoto Kyoritsu Hospital, Matsumoto, Nagano, Japan
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Hidemasa Nobara
Department of Cardiovascular Surgery, Matsumoto Kyoritsu Hospital, Matsumoto, Nagano, Japan
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Tamaki Takano
Department of Cardiovascular Surgery, University of Shinshu, Matsumoto, Nagano, Japan
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Yuko Wada
Department of Cardiovascular Surgery, University of Shinshu, Matsumoto, Nagano, Japan
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Jun Amano
Department of Cardiovascular Surgery, University of Shinshu, Matsumoto, Nagano, Japan