title: Serological investigations for evidence of an infectious aetiology of rheumatoid arthritis.
mesh_terms: D000328:Adult; D000367:Age Factors; D000941:Antigens; D001172:Arthritis, Rheumatoid / Q000209:etiology* / Q000276:immunology*; D005260:Female; D006801:Humans; D007239:Infections / Q000276:immunology*; D008297:Male; D009174:Mycoplasma / Q000276:immunology; D011511:Proteus / Q000276:immunology; D044469:Racial Groups; D012475:Salmonella / Q000276:immunology; D012737:Sex Factors; D018139:Simplexvirus / Q000276:immunology
chemical_list: D000941:Antigens