Gene expression array technology has been used to do which of the following (select all that apply)?   A. Determine liklihood of metastasis   B. Determine the most relevant treatment for individual patients based on their genomic “signature.”     C. Determine therapeutic index of cancer drug   D. Predict the likelihood of disease recurrence in individuals based on gene expression signatures   E. Stratify patients with breast cancer into groups predictive of response to therapy

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