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Characteristic and releasing test of the TEPEP patch. A. The structure of exosomes was observed by TEM. (Yellow arrows) B. Concentration of particles released by TEPEP patch in day 4. C. Mean size of particles released by TEPEP patch in day 4. D. Size distribution of TEPEP patch in day 4. E. Flash light spots were particles in different focus planes. F. Release test of TEPEP patch within two weeks.
