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van den Heuvel MG, Lemmens VE, Verhoeven RH, de Hingh IH.van den Heuvel MG, et al. Among authors: lemmens ve.Int J Colorectal Dis. 2013 Sep;28(9):1307-10. doi: 10.1007/s00384-013-1714-9. Epub 2013 May 22.Int J Colorectal Dis. 2013.PMID: 23695388