18F-fluoroestradiol (18F-FES) PET/CT for guiding first-line treatment in patients with HR + /HER2- metastatic breast cancer: impact on progression free survival. - Xie, Yizhao; Chen, Yifan; Liu, Cheng; Zhao, Yannan; Gong, Chengcheng; Lin, Shuyi; Song, Shaoli; Wang, Biyun; Yang, Zhongyi (European Journal of Nuclear Medicine & Molecular Imaging, 2025)