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. 2014 Apr 3;14:30. doi: 10.1186/1472-6831-14-30

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Copyright © 2014 Jiang et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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HE staining of human gingival tissue. A. The region between the arrows is JE (x150); B. The boundary between JE and SE, the arrow points to the boundary (x1200).