The efficacy and safety of PD-1/PD-L1 inhibitors in combination with chemotherapy as a first-line treatment for unresectable, locally advanced, HER2-negative gastric or gastroesophageal junction cancer: a meta-analysis of randomized controlled trials - Pu, Wenji; Li, Shasha; Zhang, Jinliang; Huang, Jijie; Li, Jishi; Jiang, Yong; Xu, Zhiyuan; Yi, Fan; Lan, Yuling; Xiao, Qin; Chen, Wenqi; Jin, Jing (Frontiers in Immunology, 2025)