ZEB2 and ovarian neoplasm: From 608 cases of OvCa in The Cancer Genome Atlas database (TCGA-OV data set), we selected 583 cases with primary ovarian tumors (35% were from patients with metastases, this number was close to the histological characteristics of our cohort) and compared expression levels of ZEB1, ZEB2, and miR-203a-3p in this sample set with their expression levels in normal samples from the GEO database.