Fig. 1. The protein level of (A, B) toll-like receptor 4 (TLR4) and (C, D) phosphorylated-p65 (p-p65) in spinal dorsal horn of rats with nucleus pulposus (NP) implantation (*P = 0.002 or 0.001, **P < 0.001, n = 5/group). Error bars indicate standard error of means.
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