ASCO Guideline Update: Chemotherapy and Targeted Therapy for Patients with Human Epidermal Growth Factor Receptor 2–Negative Metastatic Breast Cancer That is Either Endocrine-Pretreated or Hormone Receptor–Negative. 12 Aug, 2021 | 08:52h | UTC Chemotherapy and Targeted Therapy for Patients With Human Epidermal Growth Factor Receptor 2–Negative Metastatic Breast Cancer That is Either Endocrine-Pretreated or Hormone Receptor–Negative: ASCO Guideline Update – Journal of Clinical Oncology