Berthelot, J M Antiperinuclear factors are present in polyarthritis before ACR criteria for rheumatoid arthritis are fulfilled. [electronic resource] - Annals of the rheumatic diseases Feb 1997 - 123-5 p. digital Publication Type: Journal Article ISSN: 0003-4967 Standard No.: 10.1136/ard.56.2.123 doi Subjects--Topical Terms: Antibodies, Antinuclear--analysisArthritis--diagnosisArthritis, Rheumatoid--diagnosisBiomarkers--analysisDiagnosis, DifferentialFollow-Up StudiesHumansImmunoglobulin G--analysisProspective StudiesRheumatoid Factor--blood