Fig. 7From: Mitsui-7, heat-treated, and nitrogen-doped multi-walled carbon nanotubes elicit genotoxicity in human lung epithelial cellsClonal growth in SAEC exposed to each MWCNT material. MWCNT-7 white, MWCNT-HT gray, and MWCNT-ND black bars. V2O5 was used as a positive control, 3.16 μg/mL. * indicates significantly different from control, p < 0.05, ± SDBack to article page