POU5F1 and endometrial cancer: The expression of TWIST1, SNAI1, NR5A2, MYC, CXCR2, STK11, POU5F1 (OCT4, isoforms A, B, and B1), and HMGA2 was studied in endometrial cancer cell lines, AN3 CA, HEC-1-A, MFE 280, and MFE 296.