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miR-193a expression negatively correlated with disease severity. miR-193a expression was negatively associated with GOLD stage in AECOPD patients (A) and stable COPD patients (B). Comparison between two groups was determined by Wilcoxon rank sum test. P < 0.05 was considered significant. GOLD, Global Initiative for Chronic Obstructive Pulmonary disease; AECOPD, acute exacerbation of chronic obstructive pulmonary disease; COPD, chronic obstructive pulmonary disease.
