AJCC	American Joint Committee on Cancer
AIC	Akaike information criterion
AUC	area under the curve
BCI	vitamin B12/C-reactive protein index
CI	confidence interval
C-index	concordance index
CRP	C-reactive protein
df	degrees of freedom
HR	hazard ratio
IQR	interquartile range
ln	natural logarithm
MEK	mitogen-activated protein kinase kinase
NA	not applicable
OS	overall survival
PD-1	programmed cell death protein 1
RFS	recurrence-free survival
ROC	receiver operating characteristic
SD	standard deviation
SPSS	Statistical Package for the Social Sciences
VB12	vitamin B12