Fig. 2From: Retained particle surface area dose drives inflammation in rat lungs following acute, subacute, and subchronic inhalation of nanomaterialsTiO2 material-induced effect on neutrophil influx depending on retained surface area dose measured for various exposure times: 1-week (triangle), 2-week (diamond), 4-week (square) or 13-week (circle) (see Table 3). Both nanoparticles (unicolor) and fine particles (bicolour) were considered. Details of the post-exposure times are provided in Supplemental 8Back to article page