Postoperative adjuvant immunotherapy for pathological stage II–IVa esophageal squamous cell carcinoma after radical surgery does not improve disease-free recurrence rates - Xie, Xihao; Zhang, Hai; He, Haiquan; Wu, Bomeng; Chen, Ying; Lin, Wanli; Feng, Qingyi; Chen, Qunqing (Frontiers in Medicine, 2024)