IFNG and non-small cell lung carcinoma: The T cell lines established after repeated stimulation of PBMCs with T790M-5 or T790M-7 were then examined for their reactivity against NSCLC cell lines, including NCI-H1975 (HLA-A2− T790M+), NCI-H1975-A2 (HLA-A2+ T790M+), and HCC827 (HLA-A2− T790M−), by IFN-γ ELISPOT assay.