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in vivo retention. Visualization of bFGF (red) retention in the infarct region in animals injected with bFGF in PPM (A), bFGF in collagen (B), and bFGF in saline (C) in vivo after 5 days. Quantification of bFGF in the three groups (D) via total fluorescent area (n = 6–7). Scale bar is 25 μm. *p < 0.05.
