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. 2021 May 25;16:95. doi: 10.1186/s11671-021-03553-8

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© The Author(s) 2021

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Fig. 6 — Various kinds of liposomes. a Conventional liposome; b cholesterol-conjugated liposome; c PEGylated or stealth liposome; d ligand-targeted liposome; e multi-functional liposome