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A, IGF-1Ea; B, MGF; C, MyoD1; D, myogenin; E, HGF; F, c-Met; G, FGF2; H, FGFR1; I, Pax7; J, myostatin; K, CDKN1A (p21); L, CDKN1B (p27). *Time effect, P < 0.05 compared to Pre. #Time effect, P < 0.05 compared to Imm. §Time effect, P < 0.05 compared to +3d. ∞Age effect, P < 0.05 young compared to old. Data are geometric means ± back-transformed SEM.
