title: [Current status of the problem of seronegative rheumatoid arthritis].
authors.forename: L G
authors.initials: LG
authors.lastname: Groppa
mesh_terms: D001172:Arthritis, Rheumatoid / Q000145:classification / Q000276:immunology*; D006801:Humans; D012217:Rheumatoid Factor / Q000032:analysis*
chemical_list: D012217:Rheumatoid Factor
vernacular_title: Sovremennoe sostoianie problemy seronegativnogo revmatoidnogo artrita.