Dong Dong H H Chen Chen W W Wang Wang X X Pi Pi F F Wu Wu Y Y Pang Pang S S et al et al Apolipoprotein A1, B levels, and their ratio and the risk of a first stroke: a meta-analysis and case-control study Apolipoprotein A1, B levels, and their ratio and the risk of a first stroke: a meta-analysis and case-control study Metab Brain Dis Metab Brain Dis 2015 2015 30 30 6 6 1319 1319 1330 1330 26363640 26363640. This evidence concerns the gene APOA1 and stroke disorder.