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Meyer MM, Young SD, Sun B, Azzouz M, Firstenberg MS.Meyer MM, et al.Gastroenterol Res Pract. 2012;2012:630483. doi: 10.1155/2012/630483. Epub 2012 Feb 28.Gastroenterol Res Pract. 2012.PMID: 22474445Free PMC article.