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a) Upper panel, Graphic shows relative fluorescent signal (tumor area/whole mouse) obtained from xenograft neuroblastoma-inoculated mice 72h after injection with either NP-NH2, NP-PEG-DFL3, or NP-PEG-DFL4 (mean±SD; n=3-5 per group); lower panel b) Representative photographs of xenograft mice treated as in a), showing luminescent tumor signal (upper panels) and fluorescent nanoparticle signal (lower panels)
