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mRNA expression of PCNA (a), MyoD (b), p21 (c) and myogenin (d) after bupivacaine injection. BP bupivacaine-injected muscle, SL saline-injected muscle. Data are presented as the relative values compared to those of the untreated control group (cont). Values are the mean ± SD. Significant differences from cont (*p < 0.05)
