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Experiment 2—primary allodynia (allodynia threshold). Primary allodynia was assessed at 24 and 72 h after buprenorphine (Bup) administration. *, Surgery-induced primary allodynia (P < 0.05). Postoperative buprenorphine treatment had no long-lasting effect on measures of proximal allodynia at later time points (24 and 72 h).
