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The design of an injectable hydrogel and adhesive hydrogel patch, as well as the combined internal–external treatment strategy for MI. HA-CHO: oxidized sodium hyaluronic acid; HHA: hydrazided hyaluronic acid; GelDA: dopamine-gelatin; DA–PPy: dopamine-functionalized polypyrrole. Adapted from Ref. [62] with permission. Copyright 2019 American Chemical Society.
