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(A) Cell traction forces after 24 h-exposure to Fe2O3 and TiO2 (10 μg/mL) NPs or culture medium (CTRL) in A549 cells (n = 7). (B) Representative maps of cell traction forces for each experimental condition [color scale bar in Pascals (Pa)]. Data are presented as mean ± SE. ∗∗P < 0.01.
