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Validation of the expression and the predictive role of CCNB1. (A) Each dataset from gene expression omnibus shows that there is a higher expression level of CCNB1 in tumor tissues than in normal lung tissues. Similar results are found in TCGA dataset (B). (C) Higher level of CCNB1 expression predicts poorer overall survival and disease-free survival in GSE31210 dataset as well as in TCGA dataset. GEO: gene expression omnibus. TCGA: the cancer genome atlas. **: P<0.001.
