preferred_name: Patients who did not have a positive pd-l1 biomarker expression test result prior to the initiation of first-line immune checkpoint inhibitor therapy
preferred_name_lc: patients who did not have a positive pd-l1 biomarker expression test result prior to the initiation of first-line immune checkpoint inhibitor therapy
label: No pos pdl1 bef ici ther
label_lc: no pos pdl1 bef ici ther