Figure 3From: Different properties of ACPA and IgM-RF derived from a large dataset: further evidence of two distinct autoantibody systemsPercentage of non-rheumatoid arthritis patients with positive antibodies to citrullinated proteins/peptides (ACPA) or IgM rheumatoid factor (IgM-RF) status at the first sample. Patients are grouped according to age.Back to article page