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de Niet A, Takkenberg RB, Benayed R, Riley-Gillis B, Weegink CJ, Zaaijer HL, Koot M, Jansen PL, Beld MG, Lopatin U, Reesink HW.de Niet A, et al. Among authors: jansen pl.Scand J Gastroenterol. 2012 Apr;47(4):475-81. doi: 10.3109/00365521.2011.648952. Epub 2012 Jan 23.Scand J Gastroenterol. 2012.PMID: 22263608Clinical Trial.