Recommendations for neoadjuvant and adjuvant therapy for HER2 positive breast cancer. pCR, pathological complete remission; TCHP, taxane, carboplatin, trastuzumab and pertuzumab; THP, taxane, trastuzumab and pertuzumab; HP, trastuzumab and pertuzumab; T-DM1, trastuzumab emtansine.