Fig. 3

% Tail DNA, as evaluated by the Comet test, in A549 cells after exposure for 12 h to the no-effects dose indicated as - and IC50 concentrations indicated as + (µg/cm²) of CFs or asbestos (F3). The columns report the means + SD of triplicate analyses. Statistical analysis: *P < 0.05, **P < 0.01 and ***P < 0.001 vs. controls.