PLK1 and cervical cancer: A total of 17 cervical cancer cell lines including C-33 A, C-33-A, C-4-1, Ca Ski, Ca-Ski, DoTc2-4510, HeLa, HEp-2, HT-3, ME-180, MS751, OMC-1, SiHa, SISO, SKG-IIIa, SW756 and TC-YIK from the Cancer Genome project and 675 Genentech project were retrieved for PLK1 expression.