title: The significance of polyclonal B cell activator in patients with rheumatoid arthritis.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000276:immunology*; D001402:B-Lymphocytes / Q000502:physiology; D006801:Humans; D008213:Lymphocyte Activation; D012217:Rheumatoid Factor / Q000502:physiology; D000511:alpha-Macroglobulins / Q000502:physiology*
chemical_list: D000511:alpha-Macroglobulins; C032306:polyclonal B cell activator; D012217:Rheumatoid Factor