title: Rheumatoid arthritis: reflections on etiology and pathogenesis.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000201:enzymology / Q000209:etiology* / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D002908:Chronic Disease; D003168:Complement Fixation Tests; D004777:Environment; D006801:Humans; D007239:Infections; D007249:Inflammation; D012217:Rheumatoid Factor; D013583:Synovial Membrane
chemical_list: D012217:Rheumatoid Factor