Clinical heterogeneity of rheumatoid arthritis and the antiperinuclear factor.


OBJECTIVE To assess the diagnostic and prognostic power of antiperinuclear factor (APF) and to identify a specific pattern of rheumatoid arthritis (RA) of different evolution and prognosis. METHODS One hundred and fifty-nine sera from patients with RA, 280 sera from patients with other rheumatic diseases and 204 sera from healthy subjects were examined… (More)