Fig. 4
From: Association between lipid profiles and viral respiratory infections in human sputum samples
Lipid species that showed significantly different intensity levels in sputum based on infection type for lipids identified in the positive mode, influenza A H1 (N = 9), Influenza A H3 (N = 11) and Rhinovirus (N = 10). All lipids showed significant differences in intensity based on Kruskal–Wallis analysis (p < 0.05). These are a subset of the lipids that were identified in the variable selection step prior to clustering (see “Methods” section for details)