which was calculated as: , where pi was the resulting p value for that gene in the ith re-sampled experiment (if the p value was bigger than the cutoff and therefore censored in the result, pi was set to 0.01, i.e. the cutoff). Using this approach, genes with larger scores have stronger overall correlation. The genes were then ranked by their calculated scores. Using a cutoff of 0.001 did not change the rankings of the top 50 genes.