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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Immunohistochemical analysis demonstrating intratumoral (A) and stromal (B) CD3+ cells. The black borders mark the enriched regions, in which CD3+ cells were counted. Tumor and stroma areas are indicated. Magnification 200×.