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Kaoru Umetani
Department of Internal Medicine, Ginza-Iin Clinic
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Hideki Tatematsu
Department of Internal Medicine, Ginza-Iin Clinic
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Shin-ichirou Satou
Department of Gastroenterology, Chiba-nishi General Hospital
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Tomoko Kuwabara
Department of Gastroenterology, Chiba-nishi General Hospital