CST3 and cervical squamous intraepithelial neoplasia: Despite the fact that this strategy failed to reduce the incidence of CIN, or other indices of outcome we found evidence that it may at least partially balance the oxidative stress burden, as patients in the NacA had lower 8-isoprostane levels following radiocontrast material infusion and patients with CIN had attenuation of the increase in serum cystatin-C levels.