AUTHOR=Yang Fei , Dan Min , Shi Jindan , Fan Ling , Zhang Haoluo , Jian Tiantian , Lei Kelu , Wang Yue , Xin Juan , Yu Zhigang , Chen Wei 

TITLE=Efficacy and safety of PD-1 inhibitors as second-line treatment for advanced squamous esophageal cancer: a systematic review and network meta-analysis with a focus on PD-L1 expression levels

JOURNAL=Frontiers in Immunology

VOLUME=15

YEAR=2025

URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2024.1510145

DOI=10.3389/fimmu.2024.1510145

ISSN=1664-3224