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Printed 3D microchannels and microfluidic structures employing GelMA (10 wt %). (a) The 3D printed structure with 10 wt.% GelMA. (b) The mask employed to print the 3D structures. (c) 3D structure with vascularity. (d) printed structure and its transverse section. (e), (f) Printed structures with microstructures and microchannels.
