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In vivo whole-body fluorescence imaging in mice administered DiR-loaded formulations via tail vein at 2 h (A), 4 h (B), 8 h (C) and 12 h (D): normal mice treated by DPD-L[DiR] (a), infected mice by DPD-L[DiR] (b), infected mice by mPEG-L[DiR] (c), and normal mice by mPEG-L[DiR] (d).
