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Kirk E, Reeds DN, Finck BN, Mayurranjan SM, Patterson BW, Klein S.Kirk E, et al. Among authors: finck bn.Gastroenterology. 2009 May;136(5):1552-60. doi: 10.1053/j.gastro.2009.01.048. Epub 2009 Jan 25.Gastroenterology. 2009.PMID: 19208352Free PMC article.Clinical Trial.