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Hematoxylin and eosin staining of the retrieved structures. Left: MTs maintained their shape after bioprinting and the subcutaneous implantation process, and some vascular-like structure was observed around the MTs (indicated by the black arrow). Right: hADSCs in the retrieved structure had taken on a round shape, and vascular-like structures could hardly be observed. Scale bar = 20 μm. MTs: Microtissues; hADSCs: Human adipose-derived stem cells.
