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Khan LU, Ahmed J, Khan S, Macfie J.Khan LU, et al. Among authors: khan s.Gastroenterol Res Pract. 2011;2011:410971. doi: 10.1155/2011/410971. Epub 2010 Aug 25.Gastroenterol Res Pract. 2011.PMID: 20886063Free PMC article.