Prior to any immunohistochemistry (IHC) analysis on human HGSC samples, we confirmed the specificity of our antibody for MAP3K8 protein by performing IHC on MAP3K8-depleted SKOV3 ovarian cancer cells in the same conditions as for the clinical samples (Supplementary Fig. 1A,B). The gene discussed is MAP3K8; the disease is ovarian carcinoma.