Figure 3. Effect of NaF on apoptosis in the spleen at 21 (A, C) and 42 (B, D) days of age. (a-d) Two-dimension scatter plots depicting distribution of cells positively stained for Annexin V-PE/7-AAD. (a) CG, (b) 12 mg/kg group, (c) 24 mg/kg group and (d) 48 mg/kg group. (C-D) Quantitative analysis of total apoptotic lymphocytes. Data are presented with the means ± standard deviation, * p < 0.05, ** p < 0.01, compared with the control group. Data were analyzed by the variance (ANOVA) test of the SPSS 19.0 software.