Comparative analysis of the phase III clinical trials of anti-PD1 monotherapy in head and neck squamous cell carcinoma patients (CheckMate 141 and KEYNOTE 040) =============================================================================================================================================================== * Sara I. Pai * Sandrine Faivre * Lisa Licitra * Jean-Pascal Machiels * Jan B. Vermorken * Paolo Bruzzi * Viktor Gruenwald * Raul E. Giglio * C. René Leemans * Tanguy Y. Seiwert * Denis Soulieres