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