Intratumoral heterogeneity in PD-L1 expression in pleomorphic lung carcinoma: implications for management of stage III disease - Januszewski, A; Chang, W; Zhang, Y; Laggner, U; Bowman, A; Adefila-Ideozu, T; Moffatt, M; Cookson, W; Nicholson, A; Popat, S; Bowcock, A (Elsevier, 2019)