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Ritsuko Oikawa
Division of Gastroenterology and Hepatology, Department of Internal Medicine, St. Marianna University School of Medicine
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Yoshiyuki Watanabe
Division of Gastroenterology and Hepatology, Department of Internal Medicine, St. Marianna University School of Medicine Department of Internal Medicine, Kawasaki Rinko General Hospital
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Shuichi Miyamoto
Division of Endoscopy, Hokkaido University Hospital
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Shoko Ono
Division of Endoscopy, Hokkaido University Hospital
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Katsuhiro Mabe
Department of Gastroenterology, Hakodata National Hospital
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Hiroyuki Yamamoto
Division of Gastroenterology and Hepatology, Department of Internal Medicine, St. Marianna University School of Medicine
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Mototsugu Kato
Division of Endoscopy, Hokkaido University Hospital
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Fumio Itoh
Division of Gastroenterology and Hepatology, Department of Internal Medicine, St. Marianna University School of Medicine