1-Acyl-GPC	1-Acylglycerophosphocholine
ALT	Alanine aminotransferase
AST	Aspartate aminotransferase
AUC	Area under the curve
BA	Betaine aldehyde
BPCs	Base peak chromatograms
COPD	Chronic obstructive pulmonary disease
CRE	Creatinine
EICs	Extracted ion chromatograms
EMI	Enzyme-metabolite interaction
ESI	Electrospray ionization
HGB	Hemoglobin count
GGO	Ground-glass opacity
Healthy→ILAs subjects	The subjects who were disease-free initially and then one year later suffered from ILAs
HRCT	High-resolution computed tomography
ILAs	Interstitial lung abnormalities
ILD	Interstitial lung disease
IPA	Ingenuity pathway analysis
IPF	Idiopathic pulmonary fibrosis
LC-Q-TOF-MS	Liquid chromatography quadruple time-of-flight mass spectrometry
LY	Lymphocyte count
mTOR	Mammalian target of rapamycin
NE	Neutrophil count
NSCLC	Non-small-cell lung cancer
PA	Phosphatidic acid
PC	Phosphatidylcholine
PCA	Principal component analysis
PE	Phosphatidylethanolamine
PI3K	Phosphatidyl inositol 3-kinase
PLA	Phospholipase A
PLD	Phospholipase D
PLS-DA	Partial least squares discriminant analysis
PLT	Blood platelet count
PPI	Protein-protein interaction
QC	Quality control
RBC	Red blood cell count
RhoA	Ras homolog family member A
ROC	Receiver operating characteristic
RSDs	Relative standard derivations
RV	Representative value
sPLA	Secretory phospholipase A
SUA	Serum uric acid
WBC	White blood cell count