7Dar K A, Shahid M, Mubeen A, et al. The role of noninvasive meth- ods in assessing airway inflammation and structural changes in asthma and COPD[ J]. Monaldi Arch Chest Dis, 2012, 77 (1) :8.
8Remels A H, Gosker H R, Schrauwen P, et al. Peroxisome proliferator - activators : a therapeutic target in COPD [ J ]. Eur Respir J, 2008,31 (3) :502.
9Paone G, Conti V, Vestri A, et al. Analysis of sputum markers in the evaluation of lung inflammation and functional impairment in symptom- atic smokers and COPD patients[J]. Dis Markers, 2011,31 (2) :91.
