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Examples of biopolymer-based hemostatic sponges. (A) SSAD (skin secretion of Andrias davidianus)-enabled cellulose hemostatic sponges. Image adapted with permission from Zheng et al. [183] Copyright 2021, Elsevier. (B) Demonstration of fabrication, blood clotting and the hemostatic mechanism of 3D gelatin nanofiber-based sponges. Image adapted with permission from Xie et al. [148] Copyright 2021, Wiley.
