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(A) Fluorescence microscopy investigation at 24 h of culture of cell-laden Ch-Pec hydrogels formed in the presence of different GAs. (B) Optical investigation of spheroids in Ch-Pec hydrogels after 21 days of culture. (C) Z-stack analysis at different magnifications of spheroids in Ch-Pec-βGP hydrogels after 21 days of culture (scale bars: 100 µm).
