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Everitt HA, Moss-Morris RE, Sibelli A, Tapp L, Coleman NS, Yardley L, Smith PW, Little PS.Everitt HA, et al.BMC Gastroenterol. 2010 Nov 18;10:136. doi: 10.1186/1471-230X-10-136.BMC Gastroenterol. 2010.PMID: 21087463Free PMC article.Clinical Trial.