The Lum group contained eight cell lines characterized by a luminal phenotype (Supplementary Materials): (a) oestrogen receptor-negative/progesterone receptor-negative/HER2-positive SKBR-3, HCC-202, and HCC-1419 cells; (b) oestrogen receptor-positive/progesterone receptor-negative/HER2-positive MDA-MB-361 cells; (c) oestrogen receptor-positive/progesterone receptor-negative/HER2-negative MDA-MB-175VII and ZR75.1 cells; and (d) oestrogen receptor-positive/progesterone receptor-positive/HER2-negative CAMA1 and HCC-1500 cells. The gene discussed is PGR; the disease is hepatocellular carcinoma.