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ELISA measurements of NGF in DRGs in untreated (normal), vehicle-treated (sham), and NGF-treated rats [1 week (1W) or 2 weeks (2W)]. A, L6 DRGs. B, S1 DRGs. C, L5 DRGs. NGF values (in picograms) were standardized by tissue protein levels (in micrograms) and expressed as picograms per microgram of total protein. Values of p < 0.05 compared with the sham group are indicated. Error bars indicate SE.
