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Plaisier PW, van der Hul RL, den Toom R, Nijs HG, Terpstra OT, Bruining HA.Plaisier PW, et al. Among authors: nijs hg.Hepatogastroenterology. 1994 Jun;41(3):260-2.Hepatogastroenterology. 1994.PMID: 7959549Clinical Trial.