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Bar graph shows neutron activation analysis of gold (Au) content. Au concentrations (in micrograms per gram of tissue) in tumor and liver tissue were measured at 1 hour and 24 hours after intrahepatic arterial injection of PEG-HAuNS with or without CA4P pretreatment. Au concentrations in the CA4P-treated tumors were significantly higher than those in the non–CA4P-treated tumors at both 1 hour (* = P < .03; ** = P < .01) and 24 hours after PEG-HAuNS injection.
