ERBB2 and breast cancer: As expected, the 26 drugs used in breast cancer were chemotherapy molecules (taxanes, doxorubicin, eribulin, methotrexate, gemcitabine, etoposide, platinum, vinorelbine), endocrine therapy, targeted therapies such as everolimus and olaparib, and anti-HER2 therapies (trastuzumab, pertuzumab, trastuzumab emtansine, lapatinib), and steroids and zoledronic acid.