PsA	Psoriasis arthritis
PASI	Psoriasis area severity index
TNF	Tumor necrosis factor
IL	Interleukin
DNA	Deoxyribonucleic acid
IFN	Interferon
CD	Cluster of differentiation
CXCL	Chemokine (C–X–C motif) ligand
CCL	Chemokine (C–C motif) ligand
FDA	Food and Drug Administration
PGA	Physician Global Assessment
LFA	Lymphocyte function–associated antigen
Ig	Immunoglobulin
APC	Antigen presenting cell
I.M.	Intra-muscular
I.V.	Intra-venous
ICAM	Intercellular Adhesion Molecule
PCL	Progressive multifocal leukoencephalopathy
ADA	Anti-drug-antibodies
TB	Tuberculosis