| HMDB | Human Metabolite Data Base |
| HPLA | hyroxyphenylacetic acid |
| HPLC | high-performance liquid chromatography |
| LC-MS | Liquid chromatography–mass spectrometry |
| MODS | multi-organ dysfunction syndrome |
| PICU | pediatric intensive care unit |
| PLS-DA | partial least squares-discriminant analysis |
| VA-ECMO | veno-atrial extracorporeal membrane oxygenation |
| VIP | variance of importance |
| TCDCA | tauro-chenodeoxycholic acid |