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Masakazu Kamihira
Department of Gastroenterology, Tokyo-Kita Social Insurance Hospital
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Yuji Aoyagi
Department of Gastroenterology, Tokyo-Kita Social Insurance Hospital
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Miki Yoshida
Department of Gastroenterology, Tokyo-Kita Social Insurance Hospital
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Tatsuo Ozawa
Department of Gastroenterology, Tokyo-Kita Social Insurance Hospital