Fig. 5
The analytic graph of five principal components as five dimensions of lipid elements selected from 502 dimensions (a). Two-dimensional plans (b)Â made by PLS-DA of the first two principal components PC1 as abscissa and PC2 as ordinate where healthy patients, severe acute pneumonia (SAP), acute pulmonary embolism (APE), or acute exacerbation of chronic pulmonary diseases (AECOPD) were clearly distinguished