the igg subclass distribution of human autoantibodies to sm , double-stranded dna ( ds-dna ) , ribonucleoprotein ( rnp ) , ss-b ( la ) , and igg rheumatoid factor ( rf ) have been determined using sensitive elisa or by indirect immunofluorescence on crithidia lucilia in sera from patients with systemic lupus erythematosus ( sle ) , sjogren 's syndrome , and rheumatoid arthritis .
C0004358
autoantibodies
C0035448
rheumatoid factor