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Panic N, Maetzel H, Bulajic M, Radovanovic M, Löhr JM.Panic N, et al. Among authors: maetzel h.United European Gastroenterol J. 2020 May;8(4):396-402. doi: 10.1177/2050640620902353. Epub 2020 Jan 17.United European Gastroenterol J. 2020.PMID: 32213022Free PMC article.