title: [Seronegative rheumatoid arthritis--reality or fiction?].
mesh_terms: D001172:Arthritis, Rheumatoid / Q000145:classification* / Q000276:immunology; D006684:HLA-DR Antigens / Q000032:analysis; D015804:HLA-DR4 Antigen; D006801:Humans; D012217:Rheumatoid Factor / Q000032:analysis*
chemical_list: D006684:HLA-DR Antigens; D015804:HLA-DR4 Antigen; D012217:Rheumatoid Factor
vernacular_title: Seronegativnyĭ revmatoidnyĭ artrit--real'nost' ili vymysel?