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Kaoru Takabayashi
Center for Diagnostic and Therapeutic Endoscopy, School of Medicine, Keio University, Japan
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Masayuki Shimoda
Department of Pathology, Keio University School of Medicine, Japan
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Yasushi Iwao
Center for Preventive Medicine, Keio University School of Medicine, Japan
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Takanori Kanai
Division of Gastroenterology and Hepatology Department of Internal Medicine, School of Medicine, Keio University, Japan