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3D co-axial bioprinting. A: Schematic illustrating the processes of 3D co-axial bioprinting for 3D culture and differentiation. B, C: Images of 3D bioprinted co-axial AD constructs. D: Live & dead staining for cell viability after bioprinting. E: Proliferation evaluation after bioprinting for 9 days compared to cells in 2D and mixed control groups.
