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Confocal images of KB cells cultured with THPE-NCs at (A) 2.7 and (B) 24 μg/mL for 1, 3, 7 h, and additional 1, 2, and 5 h incubation with only fresh medium after 3 h of treatment. THPE was shown in blue and cell membrane in red. Scale bar = 100 μm.
