Application of a priori established gene sets to discover biologically important differential expression in microarray data

We thank Joseph Nevins, Bala Balakumarin, Geoffrey Ginsburg, and Alessandro Porrello for their careful review of this Commentary. P.G.F. is a Damon Runyon Cancer Research Foundation Clinical Investigator and receives additional support from National Institutes of Health Grant CA-089031 and the Prostate Cancer Foundation.

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