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In vivo fluorescent images of U87MG tumor bearing mice of armpit model given physiological saline, free DiR, DiR-loaded LS, and DiR-loaded CTX-LS via tail vein, 2 h (A), 5 h (B) and 24 h (C) after administration, respectively, and fluorescent image of major organs and tumors ex vivo (D) 24 h post-injection. Reprinted with the permission of the Journal of Controlled Release, Xiang et al., 2011.
