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Harunori Takeda
The Second Department of Surgery, Hokkaido University, School of Medicine
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Toshikazu Tachiki
The Second Department of Surgery, Hokkaido University, School of Medicine
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Osamu Matsunami
The Second Department of Surgery, Hokkaido University, School of Medicine
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Keishu Yasuda
The Second Department of Surgery, Hokkaido University, School of Medicine
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Keisuke Sakai
The Second Department of Surgery, Hokkaido University, School of Medicine
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Tatsuzo Tanebe
The Second Department of Surgery, Hokkaido University, School of Medicine