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Biodistribution of untargeted 650z and each of the three targeted NIR fluorescent s775z probes in tumor bearing mice (for each probe, N = 5). For each excised organ, the MPI for untargeted and targeted probe was measured and normalized to the thigh muscle MPI from the same animal. Error bars indicate ±SEM. p values indicate probability that untargeted and targeted MPI values are equal, *p < 0.05, **p < 0.01, ***p < 0.001.
