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Dave M, Johnson LA, Walk ST, Young VB, Stidham RW, Chaudhary MN, Funnell J, Higgins PD.Dave M, et al.Gut. 2011 Aug;60(8):1043-9. doi: 10.1136/gut.2010.224337. Epub 2011 Feb 11.Gut. 2011.PMID: 21317176Free PMC article.Clinical Trial.