Clinical efficacy and therapy response prediction of neoadjuvant dalpiciclib plus letrozole in postmenopausal patients with HR+/HER2- stage II-III breast cancer (DARLING 01): a single-arm, open-label, exploratory study - Lina Zhang; Yueping Liu; Chao Yang; Jie Ma; Yuntao Li; Ruizhen Luo; Jianjun Han; Xiaochun Wang; Zhisheng Zhang; Li Ma; Haifeng Cai; Xiangshun Kong; et al. (Breast Cancer Research, 2025)