The effect of IL-1α (10 ng/mL), IL-1β (10 ng/mL), or IL-6 (10 ng/mL) on proliferation of (a) epithelial cells (mean ± SEM; ) and (b) stromal cells (mean ± SEM; ) after 24 h incubation. All values are expressed as n-fold change from control. Asterisks indicate significant differences (*; **) from the respective control, as determined by parametric one-way ANOVA followed by Newmann-Keuls comparison test.