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Construct histology. Photomicrographs of COLI-ASC constructs cultured in stromal (A,C,E) or tenogenic (B,D,F) medium for 7 (A,B), 14 (C,D), or 21 (E,F) days. Cells (yellow arrows) within variable amounts of ECM (*) as well as template material (red arrows) were apparent. The region surrounding each arrow is enlarged in the inset at the right upper corner. Stain: H&E; Scale bars = 50 μm (A–C,E), 100 μm (D,F).
