Fig. 2From: High apolipoprotein M serum levels correlate with chronic obstructive pulmonary diseaseSerum apolipoprotein M (apoM) is elevated in chronic obstructive pulmonary disease (COPD) patients. Serum concentrations of apoM in COPD patients, grouped according to the Global Initiative for Chronic Obstructive Lung Disease (GOLD) stage, and healthy control subjects (HC). Error bars represent the standard errors of the mean. *P < 0.05, **P < 0.01 vs. HC. # P < 0.05, between two groups indicated by the horizontal lineBack to article page