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Effects of NO-1886 on the size distribution of intestinal polyps in Min mice. Min mice were fed a basal diet (filled box) or a diet containing 400 ppm (open box) or 800 ppm (hatched box) NO-1886 for 13 weeks. The number of polyps per mouse in each size class is given as a mean value; bars are SE. *, P < 0.05; **, P < 0.01.
