TI - Concurrent Use of Cyclin Dependent Kinase 4/6 (CDK4/6) Inhibitors with Palliative Radiotherapy for Metastatic Breast Cancer Patients: A Review of Toxicity AU - SÖNMEZ, Ö. AU - TEZCANLI, E. SO - Turk J Oncol 2021;36:538-542. DO - 10.5505/tjo.2021.3338