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. 2020 Sep 17;11:402. doi: 10.1186/s13287-020-01918-x

Fig. 1.

Fig. 1

Achilles tendon injury model. a The central one third of the Achilles tendon was removed to create a tendon defect. b GelMA containing TSC-Exos was infused into the Achilles tendon defect. c Radiation with 405 nm light source for 10–20 s at a distance of 3 cm from the tendon defect. d Crosslinking to form the gel state