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The percentage of lymphocyte nuclei undergoing RS in experimental groups. Light gray—d 21, dark gray—d 42, showing differences among the groups on d 21 and d 42. Dash line show linear relationship (r = −0.87) between the SBR concentration and RS formation on d 21, solid line shows linear relationship (r = −0.94) on d 42. Different letters indicate statistically significant differences among groups (P < 0.05). Values represent means ± SD (n = 6) from duplicate samples
