n=6 independent experiments (D) CCL2, CXCL2, and CXCL8 levels in CD8+ T cells supernatants from non-smoking control subjects (CtlNS) or patients with COPD (COPD) using BioPlex (CCL2, CXCL2) or ELISA (CXCL1, 3, 5, 6, 8). This evidence concerns the gene CXCL2 and chronic obstructive pulmonary disease.