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. 2018 Dec 4;19(12):3859. doi: 10.3390/ijms19123859

Figure 1.

Figure 1

Association of lipid-based drug delivery systems (LBDDSs) with biological systems. Several factors have been considered to increase the delivery efficiency of lipid-based drug delivery systems, including (a) prolonged blood circulation, (b) passive targeting through the leaky tumor vessels, (c) active targeting to penetrate within the tumor, and (d) controlled release profile of payloads.