RA	Rheumatoid arthritis
PCR	Polymerase chain reaction
IL-4	Interleukin-4
IL-10	Interleukin-10
DMARDs	Disease modifying antirheumatic drugs
RF	Rheumatoid factor
CRP	C-reactive protein
CIA	Collagen-induced arthritis
IL-6	Interleukin-6
IFN-γ	Interferon-gama
IL-17	Interleukin-17
Th17	T helper 17 CD4+ lymphocyte
NSAIDs	Non-steroidal anti-inflammatories
Bac	Bacteroides species
Bif	Bifidobacterium species
Ccoc	Clostridium coccoides species
CIEub	Clostridium coccoides-Eubacteria rectale subgroup
Clept	Clostridium leptum species
Lac	Lactobacillus
Prev	Prevotella
Ros	Roseburia
DAS28	Disease activity score
TNF	Tumor necrosis factor alpha
CTLA-4	Cytotoxic T-lymphocyte-associated antigen 4