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Russo A, Sun WM, Sattawatthamrong Y, Fraser R, Horowitz M, Andrews JM, Read NW.Russo A, et al. Among authors: read nw.Gut. 1997 Oct;41(4):494-9. doi: 10.1136/gut.41.4.494.Gut. 1997.PMID: 9391248Free PMC article.Clinical Trial.