(C) The frequency of CX3CR1+ macrophages in CD45+CD11b+ population and ALDH activity in CD45+CD11b+CX3CR1+ macrophages in lamina propria (n = 8). Data information: Data were representative and were the median ± interquartile range from three independent experiments. P values were calculated by one-way ANOVA followed by Tukey's post hoc test for multiple comparisons. 