Low dose-dependent sub-chronic effect of HgCl2 on anxiety-related behavior of male Wistar rats subjected to the elevated plus maze. (a) Total amount of time spent in exposed arms (TOA); (b) Number of entries in exposed arms (EOA); (c) Total number of arms entries (TEA). Data are expressed as mean ± SEM. The significance level is 0.05 with *p < 0.05, **p < 0.01, ***p < 0.001.