ATM and breast cancer: We also performed a sensitivity analysis that included in the “Increased” Group only the genes that were found significantly (or borderline) associated with BC in our population [16] (i.e., ATM, CHEK2, PALB2, FANCM, MAST1) or confirmed as pathogenic or predicted to be pathogenic for BC by international consortia [19,20] (i.e., PALB2, TP53, CHEK2, PTEN, ATM, BARD1, MSH6, RAD51C, RAD51D).