Representative T2-weighted images obtained 2 days after middle cerebral artery occlusion in no treatment and the 3 pre-treatment groups.

<p>Infarction volume is significantly reduced in the 3 pre-treatment groups when compared with no treatment group. Arrows indicate the margin of infarction area. Among the three pre-treatment groups, pre-treatment with E₂+CD34⁺ has the least infarction volume and shows significant difference when compared with E₂ pre-treatment groups.