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Figure 4 Mean beta-galactosidase expression after adenoviral transfection in the epicardial (EPI), midmyocardial (MID), and subendocardial (ENDO) layers of the targeted left anterior descending coronary territory. Mean ± SEM, n = 5/group. **p < 0.05 group C vs. group A and group B; *p < 0.05 group C vs. group A; #p < 0.05 group A vs. group B; p < 0.05 group B vs. group A. Line with diamonds = retroinfusion; line with triangles = percutaneous intramyocardial delivery; line with squares = surgical intramyocardial delivery.