PDCD1 and non-small cell lung carcinoma: An analysis of 29 NSCLC patients treated with PD-1 inhibitor demonstrated that 70% of patients with disease progression lacked a PD-1+CD8 T-cell response, whereas 80% of patients with a clinical response showed PD-1+CD8 T-cell responses within 4 weeks from the induction of treatment Kamphorst et al. [73].