ACPA	anti-citrullinated protein antibody
ACR	American College of Rheumatology
Anti-CarP Ab	Anti-carbamylated protein antibody
AutoAb	autoantibody
DMARDs	disease-modifying anti-rheumatic drugs
EULAR	European League Against Rheumatism
Fab	antigen-binding fragment
Fc	crystallizable fragment
GRP78	78-kDa glucose-regulated protein
HLA	human leukocyte antigen
IgG	immunoglobulins G
MPO	myeloperoxidase
MTX	methotrexate
NPV	negative predictive value
PAD	peptidyl arginine deiminase
PPV	positive predictive value
PTM	post-translational modified
RA	rheumatoid arthritis
RF	rheumatoid factor
SE	shared epitope
TNF	tumor necrosis factor