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Airway hyperreactivity (measured as APTI) after chronic inhaled LPS exposure (*P < 0.01). Open bars, IL-10–deficient 3 d after chronic LPS; shaded bars, C57BL/6 3 d after chronic LPS; striped bars, IL-10–deficient 4 wk after chronic LPS; solid bars, C57BL/6 4 wk after chronic LPS.
