The efficacy and safety of PD-1 inhibitors combined with chemotherapy treatment for advanced esophageal cancer: a network meta-analysis - Tian, Jian-Zhou; Zhang, Li; Lin, Fu-Yong; He, Ren-Jiao; Tian, Wen-Rong; Yan, Liu; Huang, Guo-Xin; Ai, Jin-Wei; Pei, Bin; Li, De-Sheng (Frontiers in Medicine, 2025)