serum concentrations of anti-dna and anti-deoxyribonucleoprotein ( np ) antibodies were measured in parallel by standardized elisa methods with a polyvalent anti-immunoglobulin conjugate in patients with systemic lupus erythematosus ( sle ) , sjogren 's syndrome ( ss ) and rheumatoid arthritis ( ra ) .
C1527336
sjogren 's syndrome
C0003873
rheumatoid arthritis