PCA plot for targeted analysis based on the significantly different metabolites.

<p>Red circles—cases; blue squares—controls. The groups are visually separable, although there is still a significant overlap between samples. It is important to note that PCs explain much more variance than in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0188580#pone.0188580.g001" target="_blank">Fig 1</a>.