Association of rheumatoid arthritis treatment response and disease duration with declines in serum levels of IgM rheumatoid factor and anti-cyclic citrullinated peptide antibody.
Mikuls TR, O'Dell JR, Stoner JA, Parrish LA, Arend WP, Norris JM, Holers VM. Association of rheumatoid arthritis treatment response and disease duration with declines in serum levels of IgM rheumatoid factor and anti-cyclic citrullinated peptide antibody. Arthritis Rheum. 2004 Dec; 50(12):3776-82.