`   Lo et al. has now confirmed that the other studies and their own were not replication studies.  This should now be added to the page. ``In sum, none of the four studies that have failed to confirmthe PCRevidence reported by Lombardi et al. (3), nor our own study, has attempted to fully replicate that study.`` http://www.pnas.org/content/early/2010/08/16/1006901107.full.pdf`