Figure 1 Detection of expression levels of target cytokines by middle ear effusion, peripheral blood serum of PC group, and peripheral blood serum of NC group A: expression level of IL-6;B: Expression level of IL-17A;C: Expression level of IL-10;D: TGF- expression level.(*P<0.05, **P<0.01, ***P<0.001, ****P< 0.0001).