Plasma ox-LDL concentrations were measured by
sandwich ELISA (intra-assay CV was 3.4% and interassay CV was 6.7%; Mercodia AB, Uppsala, Sweden),
utilizing the same speci¢c murine monoclonal antibody, mAB-4E6, as the assay described by Holvoet
et al. In order to avoid systematic di¡erences in the
current study, two internal controls were repeatedly
included on all plates.