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Comparison of lactoferrin effects with known neutrophil survival factors. Peripheral blood neutrophils were incubated with medium alone (control), 100 ng/ml LPS, 800 IU/ml IFN-β, 50 ng/ml GM-CSF, 100 μg/ml lactoferrin (LTF) and apoptosis measured by differential staining and nuclear morphology after 9 h in culture. Data are mean ± s.d. (n = 5) and were analysed by ANOVA followed by Dunnett's comparison with control. *P < 0.05, **P < 0.01.
