Fig. 2From: The role of MMP-12 gene polymorphism − 82 A-to-G (rs2276109) in immunopathology of COPD in polish patients: a case control studyMMP-12 protein level in serum of COPD patients and healthy control groups. Legend: COPD, patients with chronic obstructive pulmonary disease; CTR – controls; data expressed as medians (25 and 75% percentiles)Back to article page