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Schwille-Kiuntke J, Unverdorben A, Weimer K, Schlarb AA, Gulewitsch MD, Ellert U, Enck P.Schwille-Kiuntke J, et al.United European Gastroenterol J. 2015 Feb;3(1):31-8. doi: 10.1177/2050640614558346.United European Gastroenterol J. 2015.PMID: 25653857Free PMC article.