Comparison of the mRNA expression of cytokines by TaqMan PCR in the lung and heart. ANP, atrial natriuretic peptide; IL-1β, interleukin 1-β; IL-6, interleukin 6; IRI, ischemia-reperfusion injury; L, lung; H, heart; TNF-α, tumor necrosis factor-α. Boxes extend from the 25th to 75th percentile; the horizontal line shows the median. Error bars show the minimum and maximum. **p < 0.01 vs. the IRI + ANP group, ††p < 0.01 vs. the sham + ANP group, ##p < 0.01 vs. the sham + saline group.