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医学评论英文版原文： El Khatib S, Saeed A. Unraveling the puzzle: efficacy of PD-L1 inhibitors in esophageal squamous cell carcinomas with low PD-L1 expression—a comprehensive overview of challenges and limitations. Transl Cancer Res 2023;12(12):3245-3248. doi: 10.21037/tcr-23-1117 被点评研究： Yap DWT, Leone AG, Wong NZH, et al. Effectiveness of Immune Checkpoint Inhibitors in Patients With Advanced Esophageal Squamous Cell Carcinoma: A Meta-analysis Including Low PD-L1 Subgroups. JAMA Oncol 2023;9:215-24. 解开谜题：PD-L1抑制剂在PD-L1低表达的食管鳞状细胞癌中的疗效——挑战和局限性的全面概述 Suhaib El Khatib 1 , Anwaar Saeed 1,2 1 Division of Hematology & Oncology, Department of Medicine, University of Pittsburgh Medical Center (UPMC), Pittsburgh, PA, USA; 2 UPMC Hillman Cancer Center, Pittsburgh, PA, USA 翻译：张正 关键词： 程序性死亡配体1抑制剂有效性（PD-L1抑制剂有效性）；PD-L1低表达；食管
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