OLP	Oral lichen planus
CP	Calprotectin
sCP	Serum calprotectin
OLP-DAS	Oral Lichen Planus Disease Activity Scale
CRP	C-reactive protein
ESR	Erythrocyte sedimentation rate
LDH	Lactate dehydrogenase
AUC	Area under the curve
HLA	Human leukocyte antigen
MMP	Matrix metalloproteinase
EBV	Epstein–Barr virus
VZV	Varicella zoster virus
HHV	Human herpesvirus
HPV	Human papillomavirus
HCV	Hepatitis C virus
DM	Diabetes mellitus
IBD	Inflammatory bowel disease
WHO	World Health Organization
AAOMP	American Academy of Oral and Maxillofacial Pathology
OLR	Oral lichenoid reaction
OPMD	Oral potentially malignant disorder
ODSS	Oral Disease Severity Score
REU	Reticular-Erythema-Ulcerative
DAMP	Damage-associated molecular pattern
fCP	Faecal calprotectin
IBS	Irritable bowel syndrome
NSAID	Non-steroidal anti-inflammatory drug
DMARD	Disease-modifying antirheumatic drug
G-CSF	Granulocyte colony-stimulating factor
LP	Lichen planus
PETIA	Particle-enhanced turbidimetric immunoassay
OLP-IGA	Oral Lichen Planus-Investigator Global Assessment
OLP-SI	Oral Lichen Planus-Severity Index
OLP-SS	Oral Lichen Planus-Sign Score
NRS	Numerical rating scale
ANOVA	Analysis of variance
SD	Standard deviation
IQR	Interquartile range
N	Number
M	Male
F	Female
ROC	Receiver Operating Characteristic curve
GI	Gastrointestinal
Lkc	Leukocyte
IL-6	Interleukin 6