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Bio-distribution of liposomes in tumor model. A. Whole body imaging from 1 to 24 h. B. In vivo radiant efficiency at the tumor sites. C. Ex vivo imaging of the major organs dissected from the mice. D. Ex vivo radiant efficiency of the tumors. The statistically significant difference was analysised by student t-test and defined as *P < 0.05, **P < 0.01, and ***P < 0.001.
