We also examined estrogen‐regulated lncRNAs in other ER+ breast cancer cells, including CAMA‐1, EFM‐19, HCC1500, MDA‐MB‐134‐VI, and T‐47D, based on RNA‐seq reported previously.[42] There were 135 and 106 lncRNAs being induced and repressed, respectively, in at least three cell lines (Figure S1B and Table S1, Supporting Information). This evidence concerns the gene ESR1 and breast cancer.