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. 2007 May 24;7:88. doi: 10.1186/1471-2407-7-88

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Copyright © 2007 Chang 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 cited.

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Immunohistochemical staining for (A) CD 80^-and (B) CD80 (+1) in undifferentiated carcinoma of the nasopharynx (×400); (C) CD 86^-in non-keratinizing squamous cell and (D) CD86 (+2) in undifferentiated carcinoma of the nasopharynx (×400).