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Keiichi KODAMA
Department of Internal Medicine, School of Medicine, Keio University
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Hirokazu KOMATSU
Department of Gastroenterology, Yokohama Municipal Citizen's Hospital
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Yoshikiyo SAJIMA
Department of Gastroenterology, Yokohama Municipal Citizen's Hospital
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Naoki HASEGAWA
Department of Internal Medicine, National Minami Yokohama Hospital
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Kohdoh ISHII
Department of Internal Medicine, National Minami Yokohama Hospital