AIC	Akaike Information Criterion
AJCC	American Joint Committee on Cancer
BIC	Bayesian Information Criterion
CC	Cholangiocarcinoma
CI	Confidence Interval
DCC	Distal Cholangiocarcinoma
ECC	Extrahepatic Cholangiocarcinoma
EPV	Event-per-variable
ICC	Intrahepatic Cholangiocarcinoma
IQR	Interquartile Range
LNM	Lymph Node Metastasis
NROC	National Research Oncology Center
PCC	Perihilar Cholangiocarcinoma
PTBD	Percutaneous Transhepatic Biliary Drainage
RR	Risk Ratio
SE	Standard Error
TNM	Tumor Nodes Metastases
VIF	Variance Inflation Factor
WRP	Will Rogers Phenomenon