Variation in assay sensitivity was studied in more than 90 laboratories that assayed 4formalin-fixed, paraffin-processed breast and ovarian carcinoma cell lines with graded levels of HER-2/neu protein overexpression and known levels of HER-2/neu gene... Read More about Evaluation of HER-2/neu immunohistochemical assay sensitivity and scoring on formalin-fixed and paraffin-processed cell lines and breast tumors: A comparative study involving results from laboratories in 21 countries.
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