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In vivo biodistribution and near-infrared imaging of relative fluorescence intensity in the brain and whole mice after 24 hours of Mel-lip, Mel-Tf-lip, kFGF-lip, kFGF-Tf-lip, PasR8-lip, and PasR8-Tf-lip administration. Data are expressed as means ± S.E. (n = 6). *P < 0.05.
