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. Author manuscript; available in PMC: 2014 Aug 21.
Published in final edited form as: Brain Res. 2013 Jun 15;1527:29–39. doi: 10.1016/j.brainres.2013.06.010

Table 2.

Polynomial Regression Results of Mu-Opioid Receptor Label (Pixel Area) and Total Song

Brain Region N F(df) R2 Adj. R2 p-value
POM 17 4.98(1,14) 0.42 0.33 0.02
PAG 15 4.92(1, 12) 0.45 0.36 0.09
BSTm 14 12.26(1,12) 0.67 0.61 0.001
VTA 15 1.55(1,12) 0.21 0.07 0.25
PVN 16 1.49(1,15) 0.17 0.05 0.25
SL 16 1.31(1,13) 0.17 0.04 0.30