fig7
![Towards extracellular vesicle delivery systems for tissue regeneration: material design at the molecular level](https://image.oaes.cc/c4f27606-2eae-41f8-be4d-7070392c1fc4/5235.fig.7.jpg)
Figure 7. The in vitro release profile of EVs from scaffolds prolonged by coatings: (A) Polydopamine-coated PLGA scaffold and (B) tannic acid-coated PEEK scaffold. Figure 7A adapted with permission[97], Copyright 2018, American Chemical Society; 7B is adapted with permission[101], Copyright 2021, the authors, published by KeAi Publishing. EVs: Extracellular vesicles; PLGA: poly(lactic-co-glycolic acid).