Reader Comments

Post a new comment on this article

Update to URLs.

Posted by PLOS_ONE_Group on 08 Aug 2012 at 21:09 GMT

1.5. A Public Resource
http://plosone.org/article/info:doi/10.1371/journal.pone.0033677#article1.body1.sec2.sec1.sec5.p1

The URL in section 1.5. "A Public Resource" of Methods has been updated to www.ctti-clinicaltrials.org/project-topics/clinical-trials.gov/aact-database and the URL in Reference 5 has been updated to www.ctti-clinicaltrials.org.

No competing interests declared.