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. 2002 Jan 21;86(2):250–256. doi: 10.1038/sj.bjc.6600035

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Copyright © 2002 The Cancer Research Campaign

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Immunoexpression of ERα in human breast cancers. Nuclear expression of ERα was largely confined to malignant epithelium in the 40 samples in which it was detected; intensity was variable. (A) example of intense immunostaining (sample code 5580); (B) sample code 5667, magnification ×20, insets A′ and B′ show higher power magnification of the same tissue samples.