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Photo-blinking frequency of DiD-labelled EVs isolated from MSCs during d-STORM imaging. (a) Screenshot from the video used to calculate the photo-blinking frequency of DiD-labelled EVs during STORM imaging, showing a positive blinking region with EVs (blue circle) and a background region for blank reading (red circle). (b) Graphical representation of the photo-blinking frequency of DiD-labelled EVs (blue) against blank region (red).
