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Model comparison using prediction error curves. Null model used random number data as predictors. Model 1 used only microarray data as predcitors. Model 2 used microarray data as well as age, histology, podoplanin and deltaNp63 expression as predictors. Model 3 used only age, histology, podoplanin and deltaNp63 expression as predictors. The vertical lines shows the error bars obtained from 100 runs of the procedures.
