USF1 and atherosclerosis: In addition to the classical case-control analysis, we also analyzed: (1) the impact of the USF1 genotype variants on serum lipid parameters; (2) possible interactions of both USF1 gene polymorphisms with traditional risk factors of atherosclerosis increasing the risk of CAD and (3) we searched for traditional risk factors influencing the differences in lipid parameters, dependent on USF1 gene alleles.