Fig. 2From: Identification of lipid biomarker from serum in patients with chronic obstructive pulmonary diseaseOPLS-DA evaluation of potential biomarker candidates. OPLS-DA analysis of1 0 lipid ratios candidates: R2 = 0.619 and Q2 = 0.735. Ellipses display 95% confidence regions. Serum samples from control are in red and samples from patients with COPD are in greenBack to article page