PT - JOURNAL ARTICLE ED - , TI - Correction: Mechanisms underlying low-clinical responses to PD-1/PD-L1 blocking antibodies in immunotherapy of cancer: a key role of exosomal PD-L1 AID - 10.1136/jitc-2020-001698corr1 DP - 2021 Oct 01 TA - Journal for ImmunoTherapy of Cancer PG - e001698corr1 VI - 9 IP - 10 4099 - http://jitc.bmj.com/content/9/10/e001698corr1.short 4100 - http://jitc.bmj.com/content/9/10/e001698corr1.full SO - J Immunother Cancer2021 Oct 01; 9