AUTHOR=Koito Atsushi , Ishizaka Yukihito TITLE=Retroviruses, retroelements and their restrictions JOURNAL=Frontiers in Microbiology VOLUME=4 YEAR=2013 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2013.00197 DOI=10.3389/fmicb.2013.00197 ISSN=1664-302X