title: Rheumatoid arthritis and hairy-cell leukaemia.
mesh_terms: D000328:Adult; D001327:Autoimmune Diseases; D005260:Female; D006801:Humans; D007943:Leukemia, Hairy Cell / Q000150:complications* / Q000276:immunology; D012218:Rheumatoid Nodule / Q000209:etiology*