- For participants in the NSCLC Cohort: Known tumor programmed death-ligand 1 (PD-L1) expression status as determined by an immunohistochemistry assay during participation in other clinical studies (e.g., participants whose PD-L1 expression status was determined during screening for entry into a study with anti−programmed death 1 or anti−PD-L1 antibodies but were not eligible are excluded)