AUTHOR=Koehl Ulrike , Toubert Antoine , Pittari Gianfranco TITLE=Editorial: Tailoring NK Cell Receptor–Ligand Interactions: An Art in Evolution JOURNAL=Frontiers in Immunology VOLUME=9 YEAR=2018 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2018.00351 DOI=10.3389/fimmu.2018.00351 ISSN=1664-3224