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Hitoshi SHIBUYA
Department of Surgery, Muroran City General Hospital
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Takashi FURUYA
Department of Surgery, Muroran City General Hospital
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Rikuo NISHIDA
Department of Surgery, Muroran City General Hospital
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Yasunori FUJISAWA
Department of Pathology, Muroran City General Hospital
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Fumitake HATA
First Department of Surgery, Sapporo Medical College
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Yasuo NAKAJIMA
First Department of Surgery, Sapporo Medical College