The significance of rheumatoid factors in the definition of the sero-negative spondoarthropathies.
D000936:Antigen-Antibody Complex / Q000276:immunology*; D001172:Arthritis, Rheumatoid / Q000276:immunology; D001402:B-Lymphocytes / Q000378:metabolism*; D006801:Humans; D007111:Immunity, Cellular; D008213:Lymphocyte Activation; D012217:Rheumatoid Factor / Q000096:biosynthesis*; D013167:Spondylitis, Ankylosing / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
D000936:Antigen-Antibody Complex; D012217:Rheumatoid Factor