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a) Hydrogel structures synthesized from aldehyde and hydrazine terminated multi-arm PEG, for 3D cell culture; b) images of encapsulated C2C12 myoblasts in the dynamic hydrogels, stained with calcium-AM (green, live); c) percentages of cell viability encapsulated inside the different hydrogel networks, quantified at 24 hours (dark bars), 72 hours (medium bars) and 240 hours (light bars).145 Copyright 2014 Wiley-VCH.
