Breast cancer studies included E1 (KCNMB1), E4 (KCNN3), E9 (KCNH1, KCNK15), E15 (KCNT2), E22 (KCNK5, KCNK15), E33 (KCNQ1-OT1), E38 (KCNMA1), E48 (KCNJ9), and E63 (KCNK12). This evidence concerns the gene KCNK5 and breast cancer.