Efficacy and safety of durvalumab + chemotherapy vs. atezolizumab + chemotherapy in the treatment of small-cell lung cancer: a retrospective comparative cohort study - Zou, Yuxia; Ren, Xueru; Zhang, Huanhuan; Wang, Yuenan; Wang, Hanqi; Bai, Rubing; Zhang, Zhihong; Sun, Gengyun; Xu, Ling (Journal of Thoracic Disease, 2023)