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. 2016 Jul 15;11:334. doi: 10.1186/s11671-016-1536-0

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© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 4 — Magnetic properties of chitosan/Fe₃O₄@ILmicrocapsules. a The T₂ relaxation rates (r ₂) of chitosan/Fe₃O₄@IL microcapsules at different concentrations. b T₂-weighted MR images of chitosan/Fe₃O₄@IL. c T₂-weight MR imaging of H22 tumor-bearing mice before (left) and after (right) intratumoral injection of chitosan/Fe₃O₄@IL microcapsules