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Enhanced tumor uptake of HSA-ICG and gold nanoparticles after PDT treatment: (A) Tumor uptake of HSA-ICG after PDT treatment in superficial and deep-seated tumor models with 660 nm or 980 nm light irradiation; (B) Dark field images of gold nanoparticles accumulation in tumor tissues after PDT treatment in superficial and deep-seated tumor models with 660 nm or 980 nm light irradiation.
