GATA4 and coronary artery disorder: In a preliminary study investigating the genomic linkage to early onset of CAD in two Saudi families with heterozygous familial hypercholesterolaemia (HFH), we identified a locus on chromosome 8, which harbours the GATA4 gene, as a plausible candidate for CAD, HFH and harbouring of low high-density lipoprotein levels.