CD8A and chronic obstructive pulmonary disease: There was an increase in CD8+ T cells, NKT-like cells, and NK cells in COPD patients compared with control subjects (CD8+ T COPD 63% (58–71) control 33% (13–68); NKT-like: COPD 12% (3–14), control 3% (1–8); NK: COPD 15% (3–21), control 1% (1–4)) (median (range)).