SSB and systemic lupus erythematosus: All the patients with SLE were antinuclear antibody (ANA) positive, 87% had double stranded DNA antibodies (anti-dsDNA), 63% anti-Smith (Sm), 25% anti-SSA, 19% anti-SSB, 26% anti-ribonucleoprotein (RNP) antibodies, 69% anti-histones, but none of the patients were positive for rheumatoid factor (RF).