AUTHOR=Andersson Patrik , Ostheimer Christian TITLE=Editorial: Combinatorial Approaches to Enhance Anti-tumor Immunity: Focus on Immune Checkpoint Blockade Therapy JOURNAL=Frontiers in Immunology VOLUME=10 YEAR=2019 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2019.02083 DOI=10.3389/fimmu.2019.02083 ISSN=1664-3224