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Serum metabolomic profile of H7N9-infected patients as determined by UPLC-MS. (A) Supervised (OPLS-DA) score scatter plot of H7N9-infected patients receiving steroid treatment (H7N9 + steroid) and healthy controls (healthy) from the UPLC-MS data. (B) Heat map of significantly altered metabolites detected by UPLC-MS. Hierarchical clustering of the 23 metabolites is shown between the healthy group (n = 9) and H7N9 + steroid group (n = 4) in the discovery analysis.
