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Hendel J, Karstensen JG, Vilmann P.Hendel J, et al. Among authors: karstensen jg.United European Gastroenterol J. 2014 Oct;2(5):406-12. doi: 10.1177/2050640614547805.United European Gastroenterol J. 2014.PMID: 25360319Free PMC article.