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In vitro cellular uptake of DiR-labeled liposomes by PBNs after 30 min. (A) FCM analysis of the PBNs treated with DiR-CL, DiR-PL, DiR-PSL, and DiR-PSL (PSA). (B) Quantitative analysis of the FCM data (**p < .01). (C) Confocal images of the PBNs incubated with DiR-CL, DiR-PL, DiR-PSL, and DiR-PSL (PSA). The scale bars represent 10 μm. Data are shown as mean ± S.D. (n = 3).
