title: THE ETIOLOGICAL PROBLEM OF RHEUMATOID ARTHRITIS.
mesh_terms: D001168:Arthritis; D001172:Arthritis, Rheumatoid; D001327:Autoimmune Diseases; D005826:Genetics, Medical; D006801:Humans; D012217:Rheumatoid Factor; D013223:Statistics as Topic
chemical_list: D012217:Rheumatoid Factor
keywords: ARTHRITIS, RHEUMATOID; AUTOIMMUNE DISEASES; GENETICS, HUMAN; RHEUMATOID FACTOR; STATISTICS