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(A) Schematic diagram of the pre-set extrusion 3D bioprinting technique for liver lobule printing. (B) MIX and preset structures were compared to assess liver function, and immunostaining for CD31 (red), albumin (green), MRP2 (green), and DAPI cell nuclei (blue) was performed; scale bar = 200 μm. (Adapted with permission from Kang et al, Small, Copyright 2020 Wiley-VCH Verlag[51]).
