title: Australia antigen in rheumatoid arthritis.
mesh_terms: D000328:Adult; D001172:Arthritis, Rheumatoid / Q000209:etiology / Q000382:microbiology*; D004586:Electrophoresis; D006511:Hepatitis B Antigens; D006801:Humans; D005779:Immunodiffusion; D008297:Male; D012217:Rheumatoid Factor
chemical_list: D006511:Hepatitis B Antigens; D012217:Rheumatoid Factor