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The preparation process of CMM-silk nanofiber composite hydrogel. The injectable hydrogel is used as a vehicle to load bioactive molecules secreted by the CMM, such as transforming growth factor-β1 (TGF-β1), insulin-like growth factor binding protein-1 (IGFBP-1), and platelet-derived growth factor-AB (PDGF-AB). Reprinted with permission from [46]. Copyright (2019) American Chemical Society.
