Figure 1.

Percentage of rheumatoid arthritis (RA) and non-RA patients with a change in positivity in antibodies to citrullinated proteins/peptides (ACPA) and IgM rheumatoid factor (IgM-RF) between the first and second samples.

Ursum et al. Arthritis Research & Therapy 2009 11:R75   doi:10.1186/ar2704
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