Efficacy and safety evaluation of first-line systemic treatments for unresectable esophageal squamous cell carcinoma: a network meta-analysis - Shi, Huiling; Tan, Yong; Ma, Chao; Wei, Yushan; Shi, Fengling; Wang, Juan; Xu, Caihua; Liang, Rongrui (Frontiers in Oncology, 2024)