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Oldfield EC IV, Oldfield EC III, Johnson DA.Oldfield EC IV, et al. Among authors: oldfield ec iii.World J Gastrointest Pharmacol Ther. 2014 Feb 6;5(1):1-26. doi: 10.4292/wjgpt.v5.i1.1.World J Gastrointest Pharmacol Ther. 2014.PMID: 24729930Free PMC article.Review.