BMD	bone mineral density
DBP	vitamin D-binding protein
DMARDs	disease-modifying antirheumatic drugs
FGF23	fibroblast growth factor 23
IFN	interferon
IgE	immunoglogulin E
IL	interleukin
JIA	juvenile idiopathic arthritis
NETs	neutrophil extracellular traps
NOD2	oligomerization domain containing 2
OPG	osteoprotegerin
PD-L1	programmed death-ligand 1
PTH	parathyroid hormone
RA	rheumatoid arthritis
RANK	receptor activator of NFκB
RANKL	RANK ligand
SOSC	suppressor of cytokine signaling
Th1	type 1 helper T cells
Th17	type 17 helper T cells
Th2	type 2 helper T cells
Tregs	regulatory T cells
TLR	Toll-like receptor
TNF	tumor necrosis factor
UVB	ultraviolet B
VDREs	vitamin D response elements
VDRs	vitamin D receptors