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. 2017 Nov 25;12:101. doi: 10.1186/s13019-017-0661-x

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© The Author(s). 2017

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. 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. 3 — Histological and immunohistochemical staining and scanning electron microscopy of specimens. A: a, histological staining of fetal pig aorta; b: histological staining of decellularized aortae of fetal pigs (DAFPs); c: histological staining of tissue-engineered vascular grafts with an EC layer; d: immunohistochemical staining of ECs of vascular grafts. B: a: fetal pig aortic EC layer at low magnification; b: fetal pig aortic EC layer at high magnification; c: the inner elastic membrane of DAFPs at low magnification; d: the inner elastic membrane of DAFPs at high magnification; e: the EC layer of tissue-engineered vascular grafts at low magnification; f: the EC layer of tissue-engineered vascular grafts at high magnification