915P Longer OS and RFS for CD3high/PD-L1+ head and neck squamous cell carcinoma (HNSCC) patients. - Laban, S.; Remark, R.; Idel, C.; Ribbat-Idel, J.; Krupar, R.; Schröck, A.; Klümper, N.; Döscher, J.; Sikora, A.G.; Abou Kors, T.; von Witzleben, A.; Vahl, J.; et al. (Annals of Oncology, 2024)