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Atsushi NOBUOKA
Department of Gastroenterology, Sapporo Central Hospital
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Seishi ISHIGAKI
Department of Gastroenterology, Sapporo Central Hospital
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Atsushi HIRAYAMA
4th Department of Internal Medicine, Sapporo Medical University School of Medicine
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Koichi TAKADA
4th Department of Internal Medicine, Sapporo Medical University School of Medicine
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Tsutomu SATO
4th Department of Internal Medicine, Sapporo Medical University School of Medicine
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Tetsuji TAKAYAMA
4th Department of Internal Medicine, Sapporo Medical University School of Medicine