Fig. 2: Kaplan–Meier plots for the derivation cohort.

a Survival of tumour PD-L1 expression in the derivation cohort. b Survival of stromal CD8+ infiltration in the derivation cohort. c Survival of stromal CD3+ infiltration in the derivation cohort. d Survival of stromal CD4+ infiltration in the derivation cohort. e Survival of combined tumour and stromal CD8+ infiltration in the derivation cohort. f Survival of stromal combined PD-1+ and CD8+ infiltration in the derivation cohort. g Survival of stromal combined PD-L1+ and CD8+ infiltration in the derivation cohort. h Distribution of stromal PD-L1 expression in tumour PD-L1-negative patients (tumour PD-L1 expression < 1%).