Fig. 1From: Identification and validation of a 44-gene expression signature for the classification of renal cell carcinomasFlow diagram of gene expression signature identification and performance assessment. Gene expression profiles were retrieved from the U133A/ U133APlus2 microarray through a bioinformatics approach. Gene expression analyses were performed in the training set (six GEO microarray datasets) first and then validated in TCGA cohort two validation sets (and the FUSCC cohort)Back to article page