preferred_name: Patients who had a positive pd-l1 biomarker expression test result prior to the initiation of first-line immune checkpoint inhibitor therapy
preferred_name_lc: patients who had a positive pd-l1 biomarker expression test result prior to the initiation of first-line immune checkpoint inhibitor therapy
label: Pos pdl1 bef init ici tx
label_lc: pos pdl1 bef init ici tx