HLA	Human leukocyte antigen
DNA	Dezoxyribonulceic acid
TNF-alpha	Tumor necrosis factor-alpha
IL	Interleukin
VEGF	Vascular endothelial growth factor
PDE4	Phosphodiesterase 4
CD	Crohn’s disease
UC	Ulcerative colitis
IBD	Inflammatory bowel disease
OR	Odds ratio
GHAS	Global histology activity scores
mcg	microgram
HE	Hematoxilin and eosin
ANCA	Anti-neutrophil cytoplasmic antibodies