Change in NGF concentration in rat lower lip skin after chronic constriction injury (CCI) or sham-operation. Bars show skin NGF levels in naive rats and 11, 14 and 21 days after the operation. At 14 days post-injury [NGF] was significantly higher ipsilateral to a CCI compared to the contralateral side (P < 0.04, n = 6/group).
Evans et al. BMC Neuroscience 2014 15:1 doi:10.1186/1471-2202-15-1