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Trimble N, Johnson AC, Foster A, Greenwood-van Meerveld B.Trimble N, et al.Neurogastroenterol Motil. 2007 Sep;19(9):754-60. doi: 10.1111/j.1365-2982.2007.00951.x.Neurogastroenterol Motil. 2007.PMID: 17539891