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. 2017 Nov 21;5:91. doi: 10.1186/s40425-017-0296-4

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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. 2 — Endomyocardial biopsy revealed. a Focal mononuclear inflammatory infiltrate in early collagenized areas. b CD3 immunohistochemistry demonstrated abundant T lymphocytes while CD20 (not shown) showed only rare B lymphocytes. c CD8 immunohistochemistry showed most T lymphocytes were cytotoxic cells while CD4 staining (not shown) showed positivity in a minority of cells. d CD68 revealed also a significant number of macrophages