“THE EFFICACY OF ENDOCRINE COMBINED WITH CDK4 6 INHIBITORS IN PATIENTS WITH HORMONE RECEPTOR - POSITIVE, HER2 - NEGATIVE RECURRENT OR METASTATIC BREAST CANCER”. Vietnam Journal of Community Medicine, vol. 67, no. Số CĐ12- Bệnh viện Ung bướu Nghệ An, Aug. 2026, https://doi.org/10.52163/yhc.v67iCD12.6144.