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. 2021 Apr 19;11(13):6370–6392. doi: 10.7150/thno.57828

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(A) The schematic illustration of drug delivery system with mitochondrial alkaline pH-responsive release ⁷⁴. Copyright 2018, Elsevier. (B) The schematic illustration of Tat-mediated enhanced endocytosis into tumor cells and nuclear targeting ⁷⁷. Copyright 2018, Wiley-VCH.