ACE	Angiotensin-converting enzyme
ACE2	Angiotensin-converting enzyme 2
ACPA	Anti-citrullinated peptide antibody
APC	Antigen presenting cell
bDMARDs	Biological disease-modifying antirheumatic drugs,
BMD	Bone marrow density
COVID-19	Coronavirus disease 2019
CRP	C reactive protein
csDMARDs	Conventional synthetic disease-modifying antirheumatic drugs
FABP	Fatty-acid-binding protein
FCN	Ficolin
FOLR	Folate receptor
GM-CSF	Granulocyte-macrophage colony-stimulating factor
IFN	Interferon
IL	Interleukin
JAK	Janus tyrosine kinase
LYVE	Lymphaticvessel hyaluronan receptor
NF-κB	Nuclear factor kappa-light-chain-enhancer of activated B cells
NSAID	Non-steroidal anti-inflammatory drug
RA	Rheumatoid arthritis
SARS-CoV-2	Severe acute respiratory syndrome coronavirus 2
Th cells	T helper cells
TNF	Tumor necrosis factor
tsDMARDs	Targeted synthetic disease-modifying anti-rheumatic drugs
VEGF	Vascular endothelial growth factor