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. 2013 Jun 7;8(6):e66416. doi: 10.1371/journal.pone.0066416

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© 2013 Wu et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(A) T₂-mapping image of the Bel-7402 cells incubated with PEG-g-PEI-SPION or RGD-PEG-g-PEI-SPION at different Fe concentrations. (B) T₂ values of the cells incubated with various complexes at different Fe concentration. (means±SD; n = 3).