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Effects of morphine, 2-BFI, BU224 and tracizoline on mechanical (top) and thermal hyperalgesia (bottom) in CFA-treated rats. Left hind (non-injured) paw; right hind (CFA-treated) paw. * P < 0.05 as compared to left hind paw above ‘V’; #P < 0.05 as compared to left hind paw above ‘V’ paw (n = 6 per group).
