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Comparison of microchannel geometries in alginate hydrogel scaffolds. (a) Vertical microchannels without seeded fibroblasts. (b) Random microchannels without seeded fibroblasts. (c) Vertical microchannels with seeded fibroblasts. (d) Random microchannels with seeded fibroblasts. Color key follows from Figure 2. Scale bar is 250 μm. Color images available online at www.liebertpub.com/tec
