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In vivo targeted fluorescence imaging of xenograft mice bearing MCF-7/ADR cells treated with DOX + PSO-SLN (a) or DOX + PSO-PLN (b) at 0, 1, 2, 4, 8,12 h. PSO-SLN and PSO-PLN were obtained by adding ICG during the preparation of PSO-SLN and PSO-PLN.
