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Hirofumi Midorikawa
Department of Cardiovascular Surgery, Southern Tohoku General Hospital, Fukushima, Japan
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Megumu Kanno
Department of Cardiovascular Surgery, Southern Tohoku General Hospital, Fukushima, Japan
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Kouyu Watanabe
Department of Cardiovascular Surgery, Southern Tohoku General Hospital, Fukushima, Japan
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Kouichi Satou
Department of Cardiovascular Surgery, Sukagawa Hospital, Fukushima, Japan
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Akihiro Tsuda
Department of Cardiovascular Surgery, Sukagawa Hospital, Fukushima, Japan