SERPINB5 and breast cancer: When we applied heteroDE to breast cancer samples, we identified 7 cfRNA biomarkers (SCGB2A2, CASP14, FABP7, CRABP2, VGLL1, SERPINB5, TFF1), 3 of which (FABP7, SCGB2A2, CASP14) overlap with previously identified DCB genes.