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The effect of setropium bromide on frequent acute exacerbations of COPD for improvement of lung function and immune factors regulation in the elective surgical patients with frequent acute exacerbations of COPD
LIU Lin-sheng, YAO Wei-ping, CHEN Di-lun, CAI Di, LIU Xiao-li
Lingnan Modern Clinics In Surgery . 2021, (02): 217 -221 .  DOI: 10.3969/j.issn.1009-976X.2021.02.018