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. 2017 Dec 6;36:176. doi: 10.1186/s13046-017-0651-9

Fig. 1.

Fig. 1

Flow 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)