ACC	accuracy
ALP	alkaline phosphatase
AUC	area under the ROC curve
BBD	benign biliary diseases
CA19-9	carbohydrate antigen 19-9
CART	Classification and Regression Tree
CCA	cholangiocarcinoma
CI	confidence interval
DT	decision tree
ECLIA	electrochemiluminescence immunoassay
ELISA	enzyme-linked immunosorbent assay
GI	gastrointestinal cancers
HCC	hepatocellular carcinoma
LR	likelihood ratio
MUC5AC	mucin 5AC
NPV	negative predictive value
OD	optical density
OR	odd ratios
PPV	positive predictive value
ROC	receiver operating characteristic curve
S100A9	S100 calcium binding protein A9
SN	sensitivity
SP	specificity
TGF-β1	transforming growth factor β1
TMB	tetramethylbenzidine
YI	Youden index