PAK4 and ovarian cancer: We also used several bioinformatics tools including Tumor Immune Estimation Resource (TIMER), Tumor Immune Single-cell Hub2 (TISCH2), Gene Expression Profiling Interaction Analysis (GEPIA), Ualcan, Kaplan-Meier (KM) plotter, and Gene Set Cancer Analysis (GSCA) to predict role of Pak4 in prognosis of ovarian cancer patients.