title: [Etiology of malignant rheumatoid arthritis. (2) Its epidemiology and clinical studies].
mesh_terms: D001167:Arteritis / Q000150:complications; D001172:Arthritis, Rheumatoid / Q000453:epidemiology* / Q000276:immunology; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male