AUTHOR=Katoh Iyoko TITLE=Impacts of Endogenous Retroviruses on Tumorigenesis, Immunity, Stem Cells, and Research Safety JOURNAL=Frontiers in Oncology VOLUME=4 YEAR=2014 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2014.00066 DOI=10.3389/fonc.2014.00066 ISSN=2234-943X