In fibroblasts derived from ovarian, lung, and colorectal cancers and their respective normal tissues, INHBA was specifically expressed in fibroblasts derived from cancer tissues, while ACTA2 was expressed in fibroblasts derived from both cancer and normal tissues (Supplementary Fig. 4) and was largely absent from fibroblasts derived from ascites from ovarian cancer patients (Supplementary Fig. 5). The gene discussed is INHBA; the disease is cancer.