Tamoxifen-predictive value of gene expression signatures in premenopausal breast cancer : data from the randomized SBII:2 trial
Background: Gene expression (GEX) signatures in breast cancer provide prognostic information, but little is known about their predictive value for tamoxifen treatment. We examined the tamoxifen-predictive value and prognostic effects of different GEX signatures in premenopausal women with early breast cancer. Methods: RNA from formalin-fixed paraffin-embedded tumor tissue from premenopausal women