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. 2019 Dec 11;17(4):1559325819887048. doi: 10.1177/1559325819887048

Figure 2.

Figure 2.

A schematic diagram of passive and active targeting. Nanoparticles incorporated with ligands could specifically active target on receptors of blood vessel or cells (left and middle), while the other way is passively targeting and accumulating through enhanced permeability and retention effect (right). Adapted with permission from Farokhzad and Langer.53 Copyright (2009) American Chemical Society.