Szturz, P Letter to the editor referring to the publication entitled "The role of antagonists of the PD-1:PD-L1/PD-L2 axis in head and neck cancer treatment" by Pai et al. [electronic resource] - Oral oncology 11 2016 - e3-e4 p. digital Publication Type: Letter; Comment ISSN: 1879-0593 Standard No.: 10.1016/j.oraloncology.2016.08.007 doi Subjects--Topical Terms: B7-H1 AntigenHead and Neck NeoplasmsHumans