ERBB2 and breast cancer: Microbiome characterization of different molecular subtypes of BC can be categorized into endocrine receptor positive (BERE), human epidermal growth factor receptor 2 positives (BEHR), estrogen, progesterone, and human epidermal growth factor receptor 2 triple-positive (BRTP), and HER2 receptor-deficient triple-negative (BRTN) type.