Cell cycle correlated genes dictate the prognostic power of breast cancer gene lists.

"three publicly available breast cancer gene expression data sets were analyzed in the primary analyses: the netherlands clinical institute (nki2) data which contains clinical (including metastatic recurrence latencies) and gene expression data on 295 women [ ]; the wang data set containing gene expression data on 296 women with lymph node negative disease [ ] (geo series gse2034); and the kjx64 and kj125 data sets containing data on 189 women 64 of which were treated with tamoxifen with primary operable invasive breast cancer [ ] (geo series gse2990)."

"Competing interests The authors declare that they have no competing interests."

"AcknowledgementsWe are grateful for critical and statistical input from Robert C. Elston. This work was supported by grants from the National Institutes of Health [RO1-CA090398 (to RAK) and training grant T32-GM07250 (MSTP/CASE) (to JDM)] and an Ohio Innovation Incentive Fellowship (to JDM)."