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Serum levels of inflammatory factors were higher in patients with ALI. Compared with the NC group, serum (A) TNF-α, (B) IL-6 and (C) IL-1β levels were significantly increased in patients with ALI. **P<0.01 vs. NC. ALI, acute lung injury; NC, negative control subjects; TNF, tumor necrosis factor; IL, interleukin.
