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(A) Schematic of conditioned media experiment. Safranin-O staining after 21 days in chondrogenic medium of MSC-laden (B) CS and (C) PEG scaffolds cultured with conditioned media from MSC-laden PEG and CS scaffolds, respectively. 1× indicates concentrated conditioned media from 1 scaffold; 10× indicates concentrated conditioned media from 10 scaffolds. Scale bars: 1 mm. n = 2 samples sliced and imaged for histology.
