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Bacterial numbers in the lungs of mice treated with anti-CXCR2 antibody. Five mice were injected i.p. with anti-CXCR2 serum or control goat serum 2 h before infection, and the bacterial numbers in the lungs were determined on days 1, 2, and 3. An asterisk indicates a P value of < 0.05. Data are means and standard deviations.
