KRT19 and breast cancer: Finally, eleven exLR markers (BEX2, AC104843.1, AL136981.2, KRT19, NPM1P25, CTSG, CBR3, HOXB7, AL691447.3, RNA5SP141, and circRNA chr13_42953948_42970670_-) were selected and used to construct a BC classifier (Supplementary Table 1).