At the time of cell plating, the biopsy cultures contained 5.1, 3.4, and 2 million total cells, respectively, corresponding to roughly 3, 1, and 2 million cancer cells, as depicted by the ratio of CK8/18-positive to CK8/18-negative (non-feeder) cells on the day-0 plates (Table S8). The gene discussed is KRT8; the disease is cancer.