(a) The relative changes in gene expression (RQ) from qRT-PCR of B1 and B2 receptors were correlated. (b) Similarly, the relative change in gene expression of TRPV1 was correlated to that of B1 receptor. The relative change in gene expression is calculated as 2-ΔΔCt to show the fold increase. In case of TRPV1, the downregulation is shown as the negative fold change. The association was examined using Pearson correlation at 3 hours post-surgery.