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Lieberman DA, Rex DK, Winawer SJ, Giardiello FM, Johnson DA, Levin TR.Lieberman DA, et al. Among authors: rex dk.Gastroenterology. 2012 Sep;143(3):844-857. doi: 10.1053/j.gastro.2012.06.001. Epub 2012 Jul 3.Gastroenterology. 2012.PMID: 22763141Review.No abstract available.