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Self-healing process of chitosan and hyaluronic-acid-based polycomplex, (a) cut and repairing process of the system, and (b) repaired hydrogel. Reprinted with permission from N. Barroso et al. Self-healable hyaluronic acid/chitosan polyelectrolyte complex hydrogels and multilayers [51]. Copyright © (2020), with permission from Elsevier.
