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Release of FGF-1 from the outer alginate layer varied based on the concentration of LVM and LVG alginate used. (A) and (B) show percent release, and (C) and (D) denote the corresponding mass release of FGF-1 versus time for different outer layer formulations. There is a burst release exhibited for all conditions within the initial 5 hours (A and C), and low-dose continuous release for up to thirty days (B and D).
