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Regev A, Björnsson ES.Regev A, et al. Among authors: bjornsson es.Gastroenterology. 2014 Jul;147(1):20-4. doi: 10.1053/j.gastro.2014.05.027. Epub 2014 May 29.Gastroenterology. 2014.PMID: 24880009No abstract available.