HDAC2 and chronic obstructive pulmonary disease: Un-expectedly, normal lung function smokers had significantly more HDAC2 positive cells in the lamina propria [median (range); NS, 2952.4 per mm2 (1647.4 per mm2–4918.8 per mm2) versus COPD-CS, 1894.2 per mm2 (550.5 per mm2–2997.2 per mm2) p<0.001] and also compared to normal controls although not statistically significant.