%0 Journal Article %A %T Clinicopathological Characteristics of Patients with HR-Positive/HER2-Negative Metastatic Breast Cancer Experiencing Early Progression Within 6 Months of CDK4/6 Inhibitor Therapy %D 2026 %F %P 433-440 %V 10 %N 3 %R doi:10.14744/ejmi.269433 %U https://dx.doi.org/10.14744/ejmi.269433