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. 2019 Jun 11;20(1):608–621. doi: 10.1080/14686996.2019.1618685

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© 2019 The Author(s). Published by National Institute for Materials Science in partnership with Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 15. — The relationship between k and N in conventional (open symbols) and hetero (solid symbols) Tetra-PEG gel (reproduced from Sakai et al. [44] with permission. Copyright 2014, The Royal Society of Chemistry).