AUTHOR=Elkord Eyad TITLE=Thymus-Derived, Peripherally Derived, and in vitro-Induced T Regulatory Cells JOURNAL=Frontiers in Immunology VOLUME=5 YEAR=2014 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2014.00017 DOI=10.3389/fimmu.2014.00017 ISSN=1664-3224