The length of colon is analyzed in (D). Statistical significance between data sets was assessed by one-way ANOVA followed by Tukey's multiple comparisons post-hoc test between all groups. Values are means ± SEM, n = 5 mice per group with differences denoted by *, P<0.05; **, P<0.01; ***, P<0.001; ****, P<0.0001; ns, not significant. 