Figure 1

Serum levels of cartilage oligomeric matrix protein (COMP) in rheumatoid arthritis (RA) and other inflammatory rheumatic diseases. PsA, psoriatic arthritis; ReA, reactive arthritis; RS, Raynaud's syndrome; SCL, scleroderma; SLE, systemic lupus erythematosus; VA, leucozytoclastic vasculitis; SS, Sjögren's syndrome; CRST&PBC, CRST syndrome and primary biliary cirrhosis.