Effectiveness and safety of PD-1/L1 inhibitors as first-line therapy for patients with advanced or metastatic urothelial carcinoma who are ineligible for platinum-based chemotherapy: a meta-analysis - Liang, Weiming; Wang, Zhijing; Huang, Zhilong; Huang, Yanping; Li, Chunyan; Liang, Yiwen; Huang, Miaoyan; Zhang, Duo; Li, Chenchen (Frontiers in Immunology, 2025)