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In vitro cell viability and fluorescent images. (A) Cell viability of free Ola, NATO and ATO on Hela cell after 24 h incubation. *P<0.05; **P<0.01; no statistical significance between unlabeled groups. (B) Cell viability of FA-PCEC. (C) Fluorescent images of Hela cells treated with culture medium, FITC-labeled NATO, FITC-labeled ATO and FITC-labeled ATO+FA for 2 h and fluorescent images of A549 cells treated with FITC-labeled ATO for 2 h.
