Blockade of tumour necrosis factor α significantly alters the serum level of IgG- and IgA-rheumatoid factor in patients with rheumatoid arthritis
B Yazdani-Biuki, E Stadlmaier, A Mulabecirovic, R Brezinschek, G Tilz, U Demel, T Mueller, K Brickmann, W B Graninger, H-P Brezinschek
Annals of the Rheumatic Diseases Aug 2005, 64 (8) 1224-1226; DOI: 10.1136/ard.2004.030262