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Tooru Shimosegawa
Division of Gastroenterology, Tohoku University Graduate School of Medicine
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Naotaka Fujita
Department of Gastroenterology, Sendai City Medical Center
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Minoru Tada
Department of Gastroenterology, The University of Tokyo
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Keiji Hanada
Center for Gastroendoscopy, Onomichi General Hospital
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Sachiko Tanaka
Department of Cancer Survey, Osaka Medical Center for Cancer & CVD