title: HLA-DR4 does not predispose to higher amounts of rheumatoid factors in healthy persons.
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000276:immunology; D005260:Female; D015804:HLA-DR4 Antigen; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012217:Rheumatoid Factor / Q000032:analysis*
chemical_list: D015804:HLA-DR4 Antigen; D000949:Histocompatibility Antigens Class II; D012217:Rheumatoid Factor