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Nielsen HJ, Jakobsen KV, Christensen IJ, Brünner N; Danish Study Group on Early Detection of Colorectal Cancer.Nielsen HJ, et al. Among authors: christensen ij.Scand J Gastroenterol. 2011 Nov;46(11):1283-94. doi: 10.3109/00365521.2011.610002. Epub 2011 Aug 19.Scand J Gastroenterol. 2011.PMID: 21854094Free PMC article.Review.