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. 2019 May 16;23:11. doi: 10.1186/s40824-019-0160-3

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© The Author(s). 2019

Open Access This 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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Surface & cross-sectional views of Scaffold 1 - hollow tube braided from round fibers (a-b), Scaffold 2 - hollow tube braided from a mixture of 4DG and round fibers (c-d), Scaffold 3 - concentric bilayer tube with a mixture of 4DG and round fibers in the central lumen (e-f)