The level of cytokines/chemokines in sera of the study groups. (A) IFN-γ. (B) IL-12p70. (C) IL-1β. (D) IL-4. (E) IL-5. (F) IL-13. Short horizontal lines in each group indicate median values. The asterisk symbols (*, **, ***, and ****) are indicating of P<0.05, P<0.01, P<0.001, and P<0.0001, respectively. IFN-γ, interferon gamma.