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Tumor accumulation of dual drug-loaded SWNHs. A, B) Photoacoustic imaging of tumors at different time intervals after mice were intravenously injected with SWNHs/C18PMH/mPEG-PLA-DOX-Pt (10 mg SWNHs/kg body weight) and photographs of tumors 24 h post-injection. C) Histological studies of tumor tissues 24 h post-injection. Scale bar is 100 µm.
