Clinicopathological and Prognostic Value of Programmed Death Ligand-1 (PD-L1) In Breast Cancer: A Meta-Analysis

Qi Xue^* and Guochao Zhang

Department of Thoracic Surgery, Cancer Hospital of Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China

^*Corresponding Author: Qi Xue, Department of Thoracic Surgery, Cancer Hospital of Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China, Tel: 008618801038718 Email: