We confirmed that the ascites-derived cells express paired-box gene 8 (PAX8, a marker for serous ovarian cancer) as determined by immunocytochemistry and Western blotting (Supplementary Figures S4 and S5) [29,30,31], as well as cytokeratins as determined by Western blotting using a pan-keratin antibody (Supplementary Figure S5) as we previously reported in EOC cell line SKOV3 and OVCA429 cells [32]. The gene discussed is PAX8; the disease is ovarian serous adenocarcinoma.