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3D reconstructed LCSM image of cell viability of 3D printed GelMA structures. Adult stem cells were encapsulated in the 3D-printed GelMA at (a) low and (c) high cell densities. The cells were also seeded on the 3D printed structures at (b) low and (d) high cell densities, respectively. Adapted with permission from ref [90]. Copyright 2019 Elsevier.
