AUTHOR=Oppenheim Joost J. TITLE=Evolution of the Serendipitous Discovery of Macrophage–Lymphocyte Interactions JOURNAL=Frontiers in Immunology VOLUME=5 YEAR=2014 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2014.00530 DOI=10.3389/fimmu.2014.00530 ISSN=1664-3224