Fig. 8
Effects of LaCl3, CeCl3, NdCl3 and NaF on the viability of A549 cells. The abscissa represents the exposure concentration, while the ordinate represents the cell viability inhibition rate (%). A549 cells were treated with LaCl3, CeCl3, NdCl3 and NaF at the same concentration gradient (0, 0.1, 0.5, 1, and 2 mM) for 24 h, respectively. *Compared with the dose group at 0.1 mM, P < 0.05; **Compared with the dose group at 0.1 mM, P < 0.01