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Tadashi DOI
Department of Gastroenterology, Tokeidai general hospital
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Hisato HOMMA
Department of Gastroenterology, Tokeidai general hospital
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Shinichi MEZAWA
Department of Gastroenterology, Tokeidai general hospital
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Takehiro KUKITSU
Department of Gastroenterology, Tokeidai general hospital
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Kouji MIYANISHI
Department of Gastroenterology, Tokeidai general hospital
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Kouichi TAKADA
The fourth department of Internal medicine, Sapporo medical university, school of medicine
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Youshirou NIITSU
The fourth department of Internal medicine, Sapporo medical university, school of medicine