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mRNA levels of VEGF in HUVECs cells treated by T4 (50, 100 and 200 nmol/L) for (A) 24 h and (B) 48 h exposure times. Data presented as mean fold change ± SD. Values derived from three independent experiments. *P < 0.05, **P < 0.01, and ***P < 0.001 indicate significant differences in comparison with control group. VEGF, Vascular endothelial growth factor.
