AUTHOR=He Xiujing , Xu Jie , Meng Huan , Shi Hubing TITLE=Editorial: Targeting the PD-1/PD-L1 cancer immune evasion axis: Challenges and emerging strategies, Volume II JOURNAL=Frontiers in Pharmacology VOLUME=13 YEAR=2022 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2022.1106129 DOI=10.3389/fphar.2022.1106129 ISSN=1663-9812