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H&E stained images of heart. Representative H&E stained images of NS (A), NS+laser (B), free DOX for 1 time (C), free DOX for 4 times (D), P-DOX (E), P-GNRs (F),P-GNRs+laser (G), and P-GNRs-DOX+laser (H). Images were acquired at 400× magnification.
