Capacity of GM-CSF and other neutrophil activators to increase CD11bSurface. Fresh, heparinized blood from healthy people was incubated without or with GM-CSF or other cytokines, chemokines, and inflammatory molecules including interleukin 8 (IL-8), IL-6, granulocyte-colony stimulating factor (GCSF), interferon β (IFNβ), IL-10, IFNγ, and complement fragment 5a (C5a), 10ng/mL each as indicated, and the percent increase in stimulated over baseline CD11bSurface as described in the Methods. Comparisons were made by ANOVA using the Holm-Sidak method for multiple comparisons; *** = P< 0.001.