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Evaluation on effectiveness of salmeterol/fluticasonepropionate combined with N-acetylcysteine in treatment of   chronic obstructive pulmonary disease
XU Xiao-guang,JIANG Zhen-yu,DU Min-juan,YANG Ya-qin,JIANG Ying-chao
吉林大学学报(医学版) . 2014, (04): 870 -874 .  DOI: 10.13481/j.1671-587x.20140436