Article CD27 Ligand CD3 antigen CD70 CD70 antigen Chimeric antigen receptor Head and Neck Neoplasms Head and neck squamous cell carcinoma Humans IFN-γ Receptors, Chimeric Antigen Squamous Cell Carcinoma of Head and Neck T lymphocyte T lymphocyte activation T-Lymphocytes antigen expression cell surface protein chimeric antigen receptor controlled study cytotoxicity enzyme linked immunosorbent assay epidermal growth factor receptor epithelial cell adhesion molecule flow cytometry head and neck squamous cell carcinoma head and neck tumor human human cell immunofluorescence immunology