CD274 and non-small cell lung carcinoma: An extensive characterization of circulating immune cell populations was performed by high‐dimensional flow cytometry (HDFC) (Qiu et al, 2011; Krieg et al, 2018; Kagamu et al, 2020) in a well‐characterized cohort of 112 NSCLC patients (Table EV1A–D) undergoing PD‐L1/PD‐1 blockade immunotherapy.