Changes of serum TGF-β and MMP-9 levels in patients with chronic obstructive pulmonary disease after treated with ipratropium bromide combined with N-acety-L-cysteine and their clinical significances

QI Huiqin, ZHANG Lianlian, XING Liping, SUN Luyao, LIU Ying, YU Zhenxiang

Journal of Jilin University(Medicine Edition) . 2016, (04): 777 -782 . DOI: 10.13481/j.1671-587x.20160427