Efficacy of Oral SERDs in the treatment of ER+, HER2 - metastatic breast cancer, a stratified analysis of the ESR1 wild type and mutant subgroups. - Wong NZH; Yap DWT; Ong RJM; Zhao JJ; Chan YH; Tey JCS; Sundar R; Lim JSJ; Dawood SS (Annals of oncology : official journal of the European Society for Medical Oncology, 2023)