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Mechanical nociceptive threshold of the hind paw in spared nerve injury (SNI) and sham-operated mice 14 days after nerve ligation. The SNI group exhibited decreased mechanical nociceptive threshold compared with the sham-operated group. Each column represents the mean ± SEM from 5 (sham group) and 8 (SNI group). Where error bars are not visible, they are smaller than the symbol. ∗∗p < 0.01 vs. before surgery (pre, Student’s t-test).
