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. 2022 Oct 19;10:1023700. doi: 10.3389/fbioe.2022.1023700

FIGURE 1.

FIGURE 1

Number and keyword analysis of publications. (A) Timeline (1960–2021) of the publications referring to extracellular vesicles (EVs) (red line), exosomes or small EVs (black line), and microvesicles (blue line). (B) Timeline of the publications referring to oral-extracellular vesicles (red line), oral-exosomes or small EVs (black line), and oral-microvesicles (blue line). (C) The frequency distribution and cloud maps of keywords in the publications.