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. 2019 Dec 20;9:19502. doi: 10.1038/s41598-019-55933-x

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Localization of cell fusion related proteins in the first trimester placenta. Immunohistochemical analysis of a tissue sample from a woman at 7 weeks of gestation who underwent elective hysterectomy for cervical cancer with her pregnancy in situ. The left side shows the result of immunohistochemical staining for cytotrophoblast cell (CT), cytotrophoblast cell column (CCC), and syncytiotrophoblast (ST) areas and the right side shows extravillous cytotrophoblast cells (EVT). Arrows indicate syncytialized debris. The two bottom rows of images are of isotype control immunostaining. These panels use the same area of the specimens as depicted above. Scales for images are as indicated.