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Kato M, Ito N, Demura M, Kubo K, Mabe K, Harada N.Kato M, et al. Among authors: kubo k.BMJ Open Gastroenterol. 2018 Feb 16;5(1):e000197. doi: 10.1136/bmjgast-2017-000197. eCollection 2018.BMJ Open Gastroenterol. 2018.PMID: 29527318Free PMC article.