Patients with advanced NSCLC were randomised (1:1:1; stratified by histology and PD-L1 status) to receive cemiplimab 350 mg once every 3 weeks (Q3W) (Arm A); or cemiplimab 350 mg Q3W plus ipilimumab 50 mg once every 6 weeks (Q6W) (up to 4 doses) (Arm B); or cemiplimab 1050 mg Q3W (Arm C), for up to 108 weeks or until disease progression....For patients with PD-L1 levels <1%, ORR was 36.4% (Arm B), and 11.1% (Arm C)...