Table 1.

Pearson's correlation coefficients across the different oxygen availability conditions

Correlation	VEGF: frontal cortex			VEGF: hippocampus
	Normoxia	Hypoxia	Reoxygenation	Normoxia	Hypoxia	Reoxygenation
Cygb	0.55	0.64	0.62	0.65	0.47	0.71
Ngb	0.38	0.66	0.74	0.59	0.74	0.63

r ≥ +0.70, very strong positive relationship; r = +0.40 to +0.69, strong positive relationship; r = +0.30 to +0.39, moderate positive relationship; r = +0.20 to +0.29, weak positive relationship; r = +0.01 to +0.19, no or negligible relationship.