Whole-lung IL-13, IL-4, TGF-β, and CCL2 levels in sham- and CLP-operated mice at day 15 after surgery. Whole-lung samples were collected at day 15 and homogenized, and cell-free supernatant was analyzed by specific ELISA. The data (expressed as mean ± SEM) shown are representative of 2 separate experiments, and each group contained 6 to 7 mice. ^*P < .05 between sham (□) and CLP (▪) groups.