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Relative mRNA levels for matrix metalloproteinase genes. Quantities of relative mRNA for mmp-9 (A), mmp-2 (B) from 4 h to 7 days post-PBBI. Data presented as means±standard error of the mean. Grey dashed line represents level of relative mRNA in sham rats at 24 h post-PBBI. *p<0.05 compared with sham rats by one-way analysis of variance.
