In addition, an amendment to this study allows evaluation of the combination of nivolumab and the anti-CTLA4 antibody, ipilimumab in the neoadjuvant setting for the treatment of resectable NSCLC. In a large, multicohort, phase 1 trial, the ORR to combination ipilimumab and nivolumab therapy in patients unselected by PD-L1 status ranged from 39-47%. Incidence of grade 3-4 toxicity ranged from 33-37% across the combination ipilimumab and nivolumab cohorts which compares favorably with the rates of toxicity due to platinum doublet chemotherapy in this disease setting.