Initial analysis of the synergy of programmed cell death-1 (PD-1) inhibitor and concurrent chemoradiotherapy treatment for recurrent/metastatic head and neck squamous cell carcinoma patients. - Li, Lu; Chen, Lu; Yan, Lu; Guo, Yueqian; Li, Fang; Fan, Ming; Lan, Mei; Lai, Xin; Zhou, Jie; Huang, Yecai; Xu, Peng; Lang, Jinyi; et al. (Radiation Oncology, 2023)