Corrigendum: Relationship between programmed death ligand 1 expression and other clinicopathological features in a large cohort of gastric cancer patients - Chen, Xinhua; Zhang, Huimin; Wang, Minghao; Liu, Hao; Hu, Yanfeng; Lin, Tian; Chen, Hao; Zhao, Mingli; Chen, Tao; Li, Guoxin; Yu, Jiang; Zhao, Liying (Frontiers in Immunology, 2023)