an increasing trendP < 0.05
Furthermore, level of IL-6 declined significantly over time ( P < 0.05), while IL-13 and IP-10 levels showed an increasing trend ( P < 0.05), consistent with a previous report of postnatal decreases in IL-6, IL-8, and G-CSF, alongside increases in IFN-γ and IP-10 [ 41 ].