ERBB2 and breast cancer: The LDLs were found slightly low in HER2-positive BC patients especially the LDL-4, LDL-5, and LDL-6 carrying free-Chol, PL, and ApoB (Figure 3c, Table S2) while a significant decrease was observed for the PL-LDL-6 (p = 4.9 × 10−6; q = 2.1 × 10−4) and the free- Chol-LDL-5 (p = 0.012; q = 0.049) subfractions (Table S2).