ATCC	American Type Culture Collection
BHI	Brain Heart Infusion
CF	Cystic fibrosis
CID	Collision-induced dissociation
GC	Gas chromatography
HCA	Hierarchical clustering analysis
HMDB	Human Metabolome Database
HRMS	High-resolution mass spectrometry
KEGG	Kyoto Encyclopedia of Genes and Genome
LC-MS/MS	Liquid chromatography–tandem mass spectrometry analysis
LOOCV	leave-one-out cross-validation
MS	Mass Spectrometry
PC	Principal component
PCA	Principal component analysis
RFE	Recursive feature elimination
SESI	Secondary electrospray ionization
SESI-MS	Secondary electrospray ionization-mass spectrometry
SESI-HRMS	Secondary electrospray ionization-high resolution mass spectrometry
SVM	Support vector machine algorithm
SVM-RFE	Recursive feature elimination with SVM
VOC	Volatile organic compound
TIC	Total ion chromatogram
TOF	Time of flight