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Marsman WA, Westerterp M, van Heek NJ, ten Kate FJ, Izbicki JR, van Lanschot JJ.Marsman WA, et al.Gut. 2005 Dec;54(12):1821-2. doi: 10.1136/gut.2005.078774.Gut. 2005.PMID: 16284299Free PMC article.No abstract available.