AUTHOR=Flavell Richard A., Herndler-Brandstetter Dietmar , Ishigame Harumichi TITLE=How to Define Biomarkers of Human T Cell Aging and Immunocompetence? JOURNAL=Frontiers in Immunology VOLUME=4 YEAR=2013 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2013.00136 DOI=10.3389/fimmu.2013.00136 ISSN=1664-3224