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The effect of epidural injection of neostigmine loaded nanofibers (NLN) on the cumulative nociceptive scores of rats in the early phase (A) the late phase (B) of formalin test. Sham group treated with free PVA nanofibers (Mean ± SEM, n = 6, **p < 0.01, Repeated-two way ANOVA followed by Bonferroni test).
