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The bCCI model was built in SD rats. Pain threshold of rats to mechanical, thermal and cold stimulation were measured before bCCI surgery and then at different postoperative time points. (A) Mechanical allodynia; (B) thermal hyperalgesia; (C) cold hyperalgesia. (D) The expression of DILC was measured by real-time qPCR. N = 4, *P<0.05 vs. sham group.
