Additionally, as shown in Fig. 5, the positive correlation between HK2 and CDH2, fibronectin, MMP9, ZEB1, ZEB2 and vimentin in OV (ovarian serous cystadenocarcinoma) was confirmed by using TIMER 2.0 (http://timer.cistrome.org/) [19]. This evidence concerns the gene HK2 and ovarian serous cystadenocarcinoma.