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(a) Whole body images of athymic nude mice bearing CT26 colon tumors in their liver tissues after intravenous injection of Cy5.5-P-HA-NPs as a function of time. Arrows indicate the sites of tumors. (b) Ex vivo fluorescence images of tumor-bearing livers and organs excised at 48 h post-injection of NPs (5mg/kg). (c) Representative histological images of normal liver and tumor slices stained with hematoxylin and eosin.
