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In vivo Fluorescence images (A) and quantification analysis (B) of HeLa bearing nude mice at 0 h, 2h, 8h, 24h and 48h after tail vein injection of FPPB NPs, FPPBH31k NPs without and with MF; Ex vivo Fluorescence images (C) and quantification analysis (D) of main organs from HeLa bearing nude mice after 48h tail vein injection of FPPB NPs, FPPBH31k NPs without and with MF. Data shown as mean standard deviation (SD), n=6. (NS, non-significance, *p < 0.05, **p < 0.01)
