CD14 and chronic obstructive pulmonary disease: After gating for monocytes, single cells were gated: (A) shows gating of single cells from monocytes in FSC x SSC plot; (B) CD14+ cells were further gated in control non-smoker (CNS) and control smoker (CS), (C) COPD smoker (COPD S) and COPD reformed smoker (COPD RS).