Song, Yan Clinical Outcomes with First-line Endocrine Therapy or Chemotherapy in Postmenopausal HR+/HER2- Metastatic Breast Cancer. [electronic resource] - Breast cancer : basic and clinical research 2015 - 67-72 p. digital Publication Type: Journal Article ISSN: 1178-2234 Standard No.: 10.4137/BCBCR.S30771 doi