Heritability of asymptomatic ANA positivity is 25%. Asymptomatic ANA positive individuals did not exhibit increased cumulative genetic risk for lupus compared to ANA negative individuals. Genetic study of 1,955 asymptomatic ANA+ v 3,634 asymptomatic ANAnegs.… https://t.co/P0MmFfG7NV https://t.co/KnlyNPKG4s