4NQO	4-nitroquinoline 1-oxide
a.u.	arbitrary units
AUC	Area under the ROC curve
CI	Confidence interval
cv-AUC	cross-validated area under the curve
H&E	Hematoxylin and eosin
HC	Healthy control
MOI	Mean optical intensity
MiD	Mild dysplasia
MoD	Moderate dysplasia
NBI	Narrow-band imaging
OLK	Oral leukoplakia
OSCC	Oral squamous cell carcinoma
ROC	Receiver operating characteristic
ROI	Region of interest
SCC	Squamous cell carcinoma
SD	Severe dysplasia