The subtypes of breast cancer in the 2658 case participants were distributed as: TNBC (n = 554, 20.8%), luminal A-like (n = 1517, 57.1%), luminal B-like (n = 360, 13.5%), and HER2-enriched (n = 227, 8.5%) (Table 1). Here, ERBB2 is linked to breast cancer.