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Intrinsic bias in breast cancer gene expression data sets
BMC Cancer, 07/01/09

Mosley JD et al. - It is highly probable to identify a statistically significant association between a given gene list and prognosis in the NKI2 dataset due to its large sample size and the interrelationship between ER-alpha expression and markers of proliferation. In most respects, the TRANSBIG data set generated similar outcomes as the NKI2 data set, although its smaller sample size led to fewer statistically significant results.

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