Research Article

Expressions of MMP-12, TIMP-4, and Neutrophil Elastase in PBMCs and Exhaled Breath Condensate in Patients with COPD and Their Relationships with Disease Severity and Acute Exacerbations

Figure 2

Expressions of serum protein levels for (a) MMP-12, (b) TIMP-4, and (c) NE between different severities of airflow limitation in COPD patients. All data are presented as .
(a)
(b)
(c)